What does this mean?

So I took a few pregnancy tests this week and the first 2 were definitely positive and the one I took yesterday was lighter and today it is more apparent then yesterdays test. but still very very faint… more faint then the first 2… I am 3 days before my expected period I read all of the tests within the timeframe and the lines came up immediately… what does this mean? I’ve had 2 miscarriages before and I am praying I don’t miscarry again if I am pregnant…

Test 1⬆️

Test 2 ⬆️

Test 3 and 4 won’t even show up on camera they are so light… they just look negative on camera…

So idk what is going on…

I have PCOS

This is FMU but I only get a few hours of sleep a night maybe 3-5 on average a lot of times it is broken up into a few hours here and there