I got bronchitis at 10 weeks and was on amoxil first, then cephalexin & wound up on antibiotics for 6 weeks. I had a really hard time recovering but the antibiotics were fine, just took longer to recover. I was reassured by one of BB's LTTTC girls who said that often antibiotics are perscribed for IVF patients in early pregnancy. HTH! Maybe someone else has more info for you.