It is NOT normal to get an ultrasound at every visit. It is NOT normal to be at a doc's for another reason and then, because you're there, get an ultrasound
All 3 OBs I used (and this started in the late 1980s) used in-office ultrasound to establish dates at first prenatal visit. If I'd been in the office for another reason earlier than the typical 8-10 week first appointment, they might have done one--again, to establish dates--if I thought I was far enough along.
They were not repeated unless there was cause; with my second pregnancy, I had a repeat to check fetal viability at the beginning of the 2nd trimester, due to bleeding. The only other ultrasounds I had were the "biggie" screening one(s) at around 16-20 weeks, a more thorough one with my last pregnancy to check for neural tube defect when other testing was iffy.
There was no huge insurance bill associated with the in-office ultrasounds; the capital expenditure had been handled by the offices long before, and the doctors approached the use of the equipment as part of the routine, set fee for prenatal care. Each and every doctor I had had a "flat rate" for prenatal care and vaginal delivery; c-section was slightly different, but mostly as related to hospital charges for the OR, anesthesiologist fees, and increased cost of a slightly longer inpatient stay.
There are as many approaches to prenatal care as there are obstetricians, midwives, and family practitioners who deliver babies. But it is NOT atypical for in-office ultrasounds to be routinely administered.
I concur that waiting for STD testing is HUGELY unwise, given both the pregnancy and the need for immediate care for ANY disease. Even something as ordinarily benign as Group B strep--a vaginal bacterium that is among the normal flora for some women---can cause huge problems in the neonate. This is a single guy she's hooking up with--a single guy who probably can't be counted on to remain faithful to his married lover. That means that your wife, if B strep negative now, may be exposed later in pregnancy, should this man have sex with a woman for whom Group B strep is among the normal vaginal flora.
If I had ONE piece of advice--for the baby's safety--it would be that, if your wife tests negative early in pregnancy (it's screened for routinely), she be retested AS SHE PREPARES TO DELIVER. If she's been exposed in the interim, it can be caught, and antibiotics can be administered prophylactically. If there is inadequate time to treat the infection before delivery, a decision to deliver by c-section can be made.
This sounds alarmist, but exposure to Group B strep is the leading cause of neonatal pneumonia and preventable perinatal death---so the simple step of being tested close to delivery can save a newborn's life.
Re: other STDs: The fact that one might not immediately seroconvert after HIV exposure is not rationale for postponing testing; it is rationale for repeated testing at regular intervals. My doctor recommended every six months for 18-24 months. (This was the protocol for testing after needlestick injury in every hospital where I've worked, as well.) The most current recommendations go a step further, and suggest that all adults be screened annually. (We all know that we can't quite count on our partners to be monogamous.)
There are many other diseases for which early testing is critical. And the sooner you identify HIV seroconversion, the better.
Don't make the mistake of thinking disease is a remote possibility. The "yeast infection" raises huge flags (if nothing else, bona fide yeast infections are VERY often sexually transmitted; what are normal flora in one woman's vagina bug the heck out of another woman's. Additionally, yeast infections can help create an internal environment that is very hospitable to other organisms/diseases). You don't want to wind up with something tenacious that could have been knocked out if caught early. And it happens.
Oh--and "no unprotected sex" means no unprotected oral, too. Take it from the woman who had a year-long, serious, debilitating pharygeal infection due to exposure during oral sex. It's not safe if it's not protected--no matter how you go about it.
Good luck to you--you're in such a difficult position, and there are no easy answers.
[This message edited by solus sto at 7:16 PM, February 5th (Wednesday)]