chemical pregnancy?

I had two days of faint positives on FRERs. I genuinely don't think they were false positives, as they were completely different batch numbers (I made sure to check) and the indent/urine pool pictures I see on here didn't look like what I was getting. I tested again in the morning and got a bfn. I was heartbroken, and decided I probably had a chemical. It's now a week after my last test and I have had no sporting or anything. The two tests I got faint lines on were both taken in late evening/at night while the negative was in the morning. Could this have anything to do with it? If you read all of this, thank you. If you have any advice to share or a comment to add, I thank you as well. This has been a very trying and emotional time for me ☹️.