I had unprotected sex on February 8th, roughly 3 weeks ago. My period should have started Monday morning so I am a few days late. (I have very regular periods and I track them regularly so this has me very panicked. I’ve taken two home pregnancy tests but both were negative. If I haven’t started my period by Monday would it be dramatic of me to call my doctor and request a blood pregnancy test or should I wait until I have a positive home test?