Soooo I just had Elizabeth 2months and 6 days and my bf and I had sex literally 5wks after we had…

Soooo I just had Elizabeth 2months and 6 days and my bf and I had sex literally 5wks after we had her, we been using condoms and my last doctors I finally got birth control and here and there we don't use condoms and I have been feeling kinda nauseous and I am a little freaking out cause I don't know what it could be plus I haven't stopped bleeding since I've left the hospital!!!! My body is all over the place!!!