Hi there I am 29 years old, usually I never worry about being pregnant, I use condoms so there is no need for that. But last month we did have one night of unprotected sex. He did not ejaculate inside of me, but my period is late. I tested with a store bought pregnancy test, but it pretty much said negative. I have swollen breasts they are not sore, but seem to have gotten larger overnight, no cramping, a couple of weird things. I know this sounds strange but my fingernails have been growing pretty quickly which isn't normal for me, and they are pretty strong. I have never had nails this nice, someone told me that could be a sign of pregnancy. Should I wait the month out before getting a blood test from the doctor?