Help with faint line

Anyone else experience different variations of visibility with the faint line? I took a first response a few days ago and the line was faint but noticeable. (First picture) and yesterday I took another in the evening and it was still there but not as strong. (Second pic) anyone else experience this? I’ve taken 4 tests all with faint lines. I’m 2 days late on my period. I’m experiencing frequent urination (about 2 times per hour through most the day) mild headaches, light cramping, gassy, and a bit uneasy in the morning time but not quite nauseous yet.