I had my first prenatal appointment two days ago, mentioned my nasty cold (he said i can take robitussin & gave me a list). The assistant said if it gets worse, go to my primary care. well I didn't take Robitussin (wanted to make sure I take the right thing) so I went to the Primary Care yesterday and she prescribed amoxicillin and said it was mild bronchitis and a sinus infection. I am 5 weeks 4 days pregnant and worried I will hurt the developing baby. I took the 3 pills today and am going to call the OB in the am. Anyone else take antibiotics this early??