Confused on my pregnancy

So on the 16 of last month I had sex, and what I thought it was my period came, I was like well I guess I’m not pregnant, cause my period hit on the 24 for 1day and half straight and left but I was still spotting brown. I took a pregnancy test on Sunday it came out 2 line and 1 Faded , and I’ve been doing more pregnancy test and they come out negatives but here is the thing I’ve been feeling more tired than usual, my shortness of breath is more intense, I’ve been snacking more. So I have no idea what’s going on. Please Help