When would I consider testing?

Denae

So I normally have cycles between 28-33 days. These past two have been messed up. My last one was 43 and now I’m on 54. My husband and I are still trying to conceive even tho my cycles are messed up. I guess since I don’t have a “schedule” to know if I’m late or not for my period, how long should I wait until I test to see if I’m pregnant? I tested at 30, 35 and 38 days so far.