Weird cramping and cycles.

I feel like this is way out of whack. So I'm current still nursing my 10month old, I've had a few periods , long cycle, ovulation is a but hard to pin down in june I think I may have ovulated late, but got period on time? During the following month I had symptoms of pregnancy, nausea being a main one. Started maybe during ovulation week. I'm on 38 day cycles. Fatigue.. i just got over a second period and two days after, (I'd be about 7 weeks) I'm having cramping, very light mild... during first pregnancy I spotted for week at 7 weeks. Am I crazy, or is this possible. I keep hearing nursing can mess up a cycle, woman get "periods" for their whole pregnancy , (which is odd I cannot find any thing to support that online..) so did I have a normal first period because I may have ovulated 3 days before... what is a cause of cramping 2-3 days AFTER a period. I've never experienced this. I doubt its pregnancy related. But I'm stuck to why I'd be cramping now.