im 17. me and my boyf have been together for 2 years, we had sex and i am now 6 days late for my period. we are very cautiois and we used a condom + lube. he weed before to kill any pre cum and pulled put before he came. we both checked the condom and nothing split- i am worried and paranoid as i am late. could i be pregnant? i have recently lost weight, travelled and been stressed sl that may affect it but still very paranoid. would like a second opinion please?