So I took the MA pill around 5 weeks ago but I could only get to the doctors 4 days after I had sex (I took the one u can get up to 5 days after). Obvs it's less effective the longer you leave it and my doctor said to come back and do a pregnancy test if I hadn't started my period in 3 weeks. I didn't come on and I'm now nearly 2 weeks late on my period but I did a test last week and it was negative, is this normal and should I take another one just to be sure or??