Idk wtf is going on

So I took a two test at 8dpo they look positive to me

But I took Another test at 9dpo which I never had happen before were the test strip shows

And I took another test at 10 dpo and well bfn

Literally don’t know what’s going on my period is due tomorrow so I guess we will see I havnt had period cramps the only thing I’ve had that’s not right is kinda pinching feeling right in the center of my stomach it’s so weird i can’t explain it but it kinda feels like I’m hungry when I’m not I’m going in for two ultrasounds on the 20th to check for signs of infertility so I guess we shall see then