What the heck

We dtd so many times last month, I noticed 16-17 I had watery cm. According to Flo AF was supposed to come on the 27th since my periods have been coming every 3 weeks so I’m 5 days late according to Flo and I’m 2 days late according to Glow. Every test I’ve taken has been negative! I’m starting to get really frustrated. I guess I need to start tracking my bbt. Do y’all think a doctors office would give me a blood test this early if I asked? I haven’t even had a faint line show up yet 😒