This is so strange!

I had a faint positive on 2/5/19 and a few other faints before this date on other test brands. I went for bloodwork on 2/11/19 and it was negative. I decided to test with home tests and now they come up negative. I’m still not bleeding, and if it’s a chemical when do women usually bleed? I’m currently 39 days late on cycle day 69. Anyone else gone through this or going through this? Would love to chat. (I have posted my faint positive from 2/5/19).