What the heck, body?

Allison • 26. Married. #1 due 7/16/17!
Hi everyone! I don't post often but I am always reading. My cycles are normally longer than most, sometimes anywhere from 36-40 days long. Back in February/March, the hubs and I decided to start TTC. But then got cold feet about it. My period was late so I went to the doc to get a test because I didn't trust the OTC tests that were saying negative. At the time I was probably on CD50 or around there. The urine test at the doctor came back negative so we went back to our normal lives and stopped TTC. 
It's now CD106. Nope, not a typo. I haven't had a period since February 8th which is really unusual. I've never gone this long without a period. 
Has anyone seen had this happen? I don't know what it could be. I'm not super stressed, I haven't lost a ton of weight or anything. I'm going bonkers!