Cycle length

Jamie • Momma to 1 and married to my best friend.
I am very confused right now, on cycle day 38. I've never had a cycle last longer than 31 days and all tests are showing up negative. I had a blood test done at the dr on day 27 and it was negative.. I just don't know what's going on. I'm waiting for my period to start so I can start my cycle 3 day tests for infertility work up and I'm just so frustrated!