Stressing Out

I am stressing out over here! I was on my first round of letrozole this cycle. I tested the day after AF was due and got a positive. It was light but still obvious. Then this morning I took a digital to confirm and it said negative. So I took another frer and there was a super super faint line, but a line. I am so scared I had a chemical pregnancy, but I haven’t had any bleeding at all. I even took another frer this afternoon because I heard some women get better results when it is not fmu and my positive on Saturday was not fmu, but it was super faint this afternoon too. I’m trying not to lose hope, but it is hard!