I came off my birth control NuvaRing at the end of December. My cycle in January was 23 days, February was 25 days, and in March was 25 days. My last periodwas Thursday March 13th. This was my first time ever using opks and i THINK i got a positive Sunday 3/22. I cant say for sure because i only tested Friday 3/20 and Sunday 3/22 and it was so dark i figured i must be ovulating. Fast forward, I got a positive pregnancy test on Friday April 3rd. Has anyone else found out they were pregnant at 3 weeks? Is this viable or will it turn into a chemical? I'm so nervous I don't know how I got a positive so soon! And with my period's not being very regular yet I'm just not sure what to think. Im having a hard time even figuring out just how far along i am or how big baby is too? All the apps are saying i wont get a positive still, because theyre based off 28 day cycles.