Anyone weird about pregnancy tests?

Rayyy • Due end of April!
Does anyone keep retesting just because they can't believe it or they're nervous? 
I have a really long cycle. I got the FAINTEST positive 8 dpo
Since my cycle is long that's over 10 days before my missed period. 
Does anyone keep testing hoping the line will get darker and darker? I'm about 15 dpo and still 4-5 days from my "missed period". The line is definitely there but noting getting darker. 
I somehow just believe suddenly AF is going to get here in 5 days and I'll be heart broken. I keep having cramps and breaking out just like AF is going to come. It's like I don't believe I'm prego except for the pee on the stick and the line. My first OBGYN appt is first week sept.