4 months PP

I'm more than 4 months PP now and still no sign of AF.
And I'm barely breastfeeding now.  
But anyway, I'm wondering if this is normal or if I should schedule a doctor's appointment?

What do you mean by "barely"? I heard that even when you go from EBF to supplementing, AF can still be delayed because you're still breastfeeding and the hormones are still there. Or something like that, sorry if that doesn't make sense.

Barely meaning I'm pumping about 3oz a day and LO won't latch 99% of the time. I've had supply issues from the get-go and had to supplement, which wrecked what supply I did have, and to top it off LO started teething early and refusing my breast. So I'm pretty much down to no supply.  

Aw, I'm 4 and a 1/2 months PP. I've been bleeding since I had LO thanks to Depo. Stupidest thing I ever did. Anyways, I didn't get it again when I was supposed to so I stopped bleeding last week, and I'm hoping it doesn't start again..

So I'm not sure if that counts as AF or not and I'm not too sure how long it is before your typically supposed to get one after birth either.. Lol. No help. I know.

I didn't BF at all and it still took almost 12 weeks for me to get my first pp peroid.