Cycles since TTC

Kels • 23, married to my best hunky friend!
Hi! Just wondering if any of you since you started ttc have had any changes in your cycles? Since starting 5 months ago, I've had TERRIBLE pms symptoms starting a week and a half before AF (super sore breasts, bloating, tired,). I'm taking a couple months off work since hubby and I are preparing for a move in December, so it's not stress. 
Before TTC, my periods were pretty consistent with an average medium flow. As of lately they've been pretty light and not as crampy (which I totally don't mind, buuut concerned it's affecting fertility somehow?) 
Anywho, just wondering if it's just me and I should go get checked out or if this is normal? I was thinking maybe my body knows what we're trying to do and it's just preparing/trying? Who knows! 
Any ideas? Thanks ladies!