I ve been trying to conceive for past 2 years all the test for me and my husband came clear so there s no reason to not conceive also I have a daughter who is 7 years old . However just before I had her it was after my doctor gave me antibiotic (doxcycline) for infection that I had .I was also taking folic acid at that time and 3 weeks after that I was positive pregnant .. what am asking is shall try and take the antibiotic (doxcycline ) again would help?