Positive FRER yesterday & negative today

I’m feeling a little confused.

yesterday morning I got a faint positive Frer and this morning I got a negative.

I have had loads of nasty indent lines on frers before so I know what I had yesterday was a positive. Which I was expecting due to my symptoms, I just know I’m pregnant. Now after this negative I am feeling a bit deflated and honest a bit crazy too ( even though I know I’m not at the same time, UGH! ) I did get up to pee in the middle of the night which I never do, so I don’t know if that’s why I got a negative. AF is due in 4 days. I’m so worried about a chemical 😭 we have been TTC for 11 months.

has any had this happen and have a healthy pregnancy in the end?