NEED ADVICE!!!

My husband and I have been TTC for over 7 years (with 0 results)

My periods can range from 26 days to 41 days.

But days between periods has not been over 36 days since March 2017.

I'm now reaching day 40 with no sign of af yet

At what point do I give in and take a test????

Don't think I could take the disappointment again 😪

Any advice would be great, TIA X