13dpo *very* faint lines

So I got a very faint positive on 11dpo? You could barely see anything and I thought it was an indent. Yesterday it only barely got darker, if any. And this morning I tested with FMU but did not see anything so I went about my day. Came back later and saw a faint line. I don’t know what to think because the lines aren’t really progressing.

The top 2 pics includes tests taken from last night and this morning. The last pic is of test taken yesterday. I just don’t know if I’m pregnant or could this be a chemical? 😔 ugh I just don’t know what to feel.