help!!!

so i stopped taking my birth control

pills in feb.

my last period was march 23-27.

a couple days later i started bleeding for 3 days and then stopped.

last friday night (april 17th) I’m pretty positive I was ovulating, I had the WORST pain in my lower stomach on the right side.

I was supposed to start my period monday this week and still havent..

when should i test???