Hi all I am 26 & mum of 3 I have been on the contraceptive pill for years but I changed my last pill after I had my youngest son who is now 20 months & my periods have always been like clockwork 1 day late & bleed for 6 intime for the next pack of pills but 2 weeks ago my dentist put me on antibiotics which only took now & again & during this time had intercourse once that I recall & now I have finished my pack ready for my period & it hasn't come its been 3 days & am getting weird cravings & going off food that I used to love is there by anychance I could be preggers? Please help I am going insane with worry