Lines getting lighter

Fay

I took 5 tests the other day and they were all positive. I had went to the hd the next day and got a positive as well. Well last night I took another test to see if they were getting darker and the line was even lighter. Today I have taken two and the lines are almost not there. They are almost so faint you can't see them. My question is, what can I expect from this? I haven't had any out of the normal cramping. The same as I did with my daughter. It has all been one sided. I am 4weeks and 1day today. I can't keep myself from fearing the worst possible case. Ladies I would love to hear your experiences please.