I had implant out on 26th march wasnt told about the 7 day rule of having sex or using a diff form of bc. Started the pill 2 days bfore removal. Had sex the day befor the day after and also throught the month. I had aslight bleed on the 16th april which lastef till the 18th i thought this might have been af but no bleed since. Also hav backache, getting headaches, slight cramps in stomach feeling sick but not being sick i can notice a bit of weight gain too. Took test sum have cum up neg and a few with a v faint line but then disappered to leave a negative line. Could i be pregnant?! Help please