Serious question

So my period has been off ever since I had my first kid On June 4th At first when it first came back a month after having him it was all fine. But after 7 months I skipped a month of period in April I checked if I was pregnant all test came back negative then the following month i got my period again.

I thought it was a fluke so I go on.

Then my period seemed a little irregular Like it would start for a few months being like between the 11-13 then jumped to starting between the 17-18 then jumped to the 21st.

Then after 12 months I missed another period in May. So then I got a little concerned and now, 2 months later, it seems I’m about to miss another period this month so far and I’m having minor cramps like it would be there... but idk? Should I ignore this and just keep going or go see a doctor?? I’m kinda at a loss at this point. Is this normal after having a kid? My son is 2 at this point.