Day 37, when to test!?

Kristyne
I'm on day 37 of my cycle. For the past 2 years I've been trying to conceive but my cycle has been irregular due to stopping depo. For the past six months though it has been 33-37 days. I've had breast tenderness for about a week and keep think my period would start but it hasn't. I've taken so many negative tests in past months that I'm feeling anxious to have another. Ugh, why can't this be easier!? Do I test for peace of mind? Or wait longer?