My last period was Jan 24, 2013...unprotected sex happened on Feb 13. I took the Plan B, both pills at once, on Feb 17th--about 100 hours later. My cycle is normally 27-29 days. Tomorrow is the 29th day in my cycle. I still haven't had any signs of starting my period. I'm trying not to stress because I know it can make my perod come late so I try not to think about it too much but I need to know...whens the soonest I can take a HPT?? Please help.