I had sex a little over a month ago (beginning of October/ end of September). Soon after we had sex i got my period, business as usual. Then as it is now November my period is late by about 10 days. So i got nervous despite not having sex since my last period, so i took a pregnancy test and it was negative. Then just to be sure i waited 5 more days then took another, once again negative. My period hasn't always been the most regular but i have no idea whats going on here and its really stressing me. If anyone could soothe my nerves in any way here i'd very much appreciate it.