There may have been an explanation for our infertility after all

My husband just got his latest SA results (not that they're necessarily relevant at this point!). We're pretty surprised by the variation in the results from last week and his first SA in May. Of course, the tests were carried out at different facilities and I'm inclined to put more stock into the SA performed by the fertility clinic than the regular lab.
Anyway, the latest results are drastically different (mainly worse) than the first results were. Example: motility. This time it came back at 31% (which is low - it's supposed to be at least 50% according to the report). Last time it came back at 67%! That's a crazy difference. The count was drastically different too. The most worrying, I think, was the % of normally formed sperm: only 3%. Apparently that's supposed to be 14% or higher. His count was 34 million/ml, whereas last time it was 107 million/ml. 34 million is fine, though. The conclusion of the report is this:

Concentration, forward progression, and total motile sperm are within normal limit. Motility is below normal limit.

The proportion of the normal forms (3%) is in a range where fertilization may be compromised.

If this pregnancy proceeds normally, this all might be irrelevant. I just wonder if our infertility wasn't really "unexplained" after all - it could have been male factor infertility all along. I wish the first SA had been done at the fertility clinic! Obviously things can change in 3 months, but he hasn't been sick, he hasn't started smoking, he rarely drinks, doesn't do drugs, doesn't use hot-tubs etc. I'm surprised at the huge difference in reports, but I guess none of that matters at the present time. It only takes 1 sperm to fertilize the egg, and somehow that happened. I think we might have beaten the odds, based on this last SA! 

I also got a call from the RE office yesterday, because one of my cervical cultures tested positive for something called mycoplasma. Apparently it's very common, according to the nurse I spoke with. The RE prescribed antibiotics for both of us, but when I told the nurse I'm pregnant she spoke with the RE and he said my OB should decide what to do about it. The antibiotics he was in the process of prescribing aren't OK during pregnancy apparently, and I guess because I'm pregnant and we conceived naturally he doesn't want to be involved with treating me now. I can understand that, because it's not like we conceived as a result of infertility treatment. I think if we conceived through IUI or something, he'd probably treat me. As it is, I'm seeing my OB on Monday anyway. 

I'll admit I was kind of freaked out yesterday when I got the news, but only because the information given to us by the RE last week mentioned mycoplasma and a link with miscarriage. The thing is, I'm trying to think about it logically: if we hadn't seen the RE, I wouldn't have been tested for this and wouldn't have known I have it. Surely lots of people are walking around with this thing and have no idea. I've never had any symptoms of anything! Anyway, ignorance is bliss in a way - but knowledge is power. I'll find out on Monday if we need treatment, or if it's OK to leave it alone. I don't want anything to cause problems with the pregnancy, obviously. I'll do whatever I need to do to protect this little bean. I've left a voicemail message for my OB this morning, asking if mycoplasma is something that requires urgent treatment or not. I know I'm a worrier, and waiting until Monday is most likely fine, but I just want to hear that from my OB. :)