I read something similar to my case but i still would like some feedback on my case please. I'm currently taking birth control pills. This month i did not miss any. Three days before i was suppose to start my period i took the plan b pills just for the extra protection. I'm now on my fourth pill of my last week for the pack (the pills when i regularly get my period) and i have still not gotten my period. I took a pregnancy and it came out negative. Could i be pregnant? Is this normal to happen?