Waiting for a positive

Kimmy
Did anyone have to wait this long for a positive after missing their period? I'm 3 days late for my period and in the last 13 years I've only been late twice so it is very unusual for me. In the past 3 days I have taken a pregnancy test each morning and all were negative. I have had none of my usual PMS symptoms. My nipples are sensitive and I've been getting headaches so I feel like I did the last time I got pregnant. But I don't have a positive yet and the wait for a period or positive is driving me nuts! I'm thinking I may have ovulated later than usual and implanted the day I normally would have gotten my period when I had a little discharge and haven't built up enough hcg yet which may mean I have to wait up to another week. This is torture lol