Need advice..

So ladies I took 4 pregnancy tests all came back with faint positives. Took a 6 day response and came back with a even darker line. I’ve been nauseous, moody, had fatigue, light cramping, etc. The whole works. Bought these cheap tests to watch my line progression, and the line almost but sure it completely disappeared. Me upset, Drive to the nearest cvs. Buy a normal 5 day sooner, with blue ink. Even though I like the pink ink. 🤦🏼‍♀️ I did pee about 3 times now within an hour. The line is there but light. My mother told me to take one in the morning when my HcG is higher and to not get discouraged yet. Especially because I’ve been drinking so much sprite to hold down my nausea, my urine is diluted. She also said to go get a blood pregnancy test done and that can confirm it.

Ladies be honest with me...what is going on?