Still pumping exclusively, may be pregnant

So since 1/29 I’ve been having dull cramping in my lower abdomen, and boom I felt pregnant all of a sudden. I’m still exclusively pumping for previous 24 weeker who is 8 months old now. I usually don’t have cramping at all. My period is due sometime this week. And I have pretty much dull cramps the whole week. My milk supply has also dropped a little. What do you guys think. Could I be pregnant.