When to test?

Sam

Ok ladies so I'm a little irregular but usually my periods are around 32 days. I'm on cycle day 19. I had a chemical last month. On Cycle day 6 & 7 I got positive OPK's (after the chemical) then a negative OPK cycle day 8. I bd cycle days 7/8/10/12 that week. When should I take a pee test ? Took one today & it was negative. Thanks ladies !