Weird periods

My husband went through chemo 2 years ago, he was told that there was a high possibility he would be infertile. We have unprotected sex regularly, as we aren’t afraid of conception either way. For the past 3 months I have had very light periods; I used to have periods lasting for 5 days (super plus tampons would need to be changed every two hours), and now they are light enough to use the same pantry liner for 8 hours. I have been very bloated looking in the stomach, whereas I have been thin my entire life regardless of the food I eat. I get my “period” on time, and lately I’ve had cramps a few times during my cycle (not while bleeding) that have made me bend over and cry in pain. Any people who’ve had the same experience? If so, what could it be?