I feel super sad and confused

Sorry about this post but I need some advise after my period which wasn't normal I took about 3 pregnancy tests 2 showed BFN so this ,Monday about a week later I took the 3de one at first it looked like a BFN. later in the day I looked at it again and saw a very light line. this line is not on any of the other hpt. i was happy but also freaking out😁😁😁😁. But today I took a blood test and now I'm sad and don't know what to feel as it came back as a negative 😢😭😢😭😢. can anyone explain this to me? What should I do.....? please girls help me out