1st pic

So I was going to take a pregnancy test but I see some very pinkish blood this was on November 28th. My cycles never start like that so it was kinda strange. So I never took the test cause I assumed that maybe it was my cycle or something idk. But I bled for 3 days & my cycle days is 5. & it wasn’t heavy at all. I decided to take a pregnancy test after the 3rd day. & I got this on the 1st pic. But a day after I took 2 more test & the lines are barely showing. Could this have been a chemical pregnancy?

2nd pic