Postpartum periods

Ok.. I had my 2nd to me (but 4th birth) baby 5 months and 2 days ago. I had postpartum bleeding for a good 4.5-5 weeks.. then when my little was about 3 or so months old, I had my first period. It was THE👏WORST👏 period I have literally ever had in my whole life.. but now we're sitting here 2ish months later.. and no 2nd period. I've had 3 instances of spotting while going potty, but no period. What's this all about? Should I get a test?