Still no period almost 5 months after baby

[Cr20]

If anyone can relate , please feel free to reply to this.

My son was born 12th December 2022
I've currently had no period apart from a very light bleed for a day and a half on the 14th of March for a day and a half.

For about 4 weeks now I've had constant back pain that located most of my left side , lower back pain and also the back of my ribs, it's just like a dull achy pain constantly , I have lower abdominal cramps , uncomfortable bloating and short of breath to the point I feel like I've been physically winded. The past week it's got worse and accomplished with leg cramps that are like muscle weekends.
(I've handed in a urine sample and nothing abnormal in urine)

I've held off going to gp as it's just felt like really bad pms but then nothing will come of it.
I have an appointment at half 3 tomorrow for the doctor to feel my stomach and my back , maybe possibly need to get a X-ray to see what the cause actually is.

This is my 3rd baby and never experience this sort of pain or if it's even related to periods. My question is pretty much asking how yous felt with your first period coming after having a baby

Are you breastfeeding? My periods took the best part of a year to come back after having my babies. The first one was probably a bit worse than usual for pain and flow but that might just be because I’d got out of the habit. It’s definitely worth seeing your GP, because that sounds like it could be something else.
Is there a chance you could be pregnant?

@Findyourneutralspace Thankyou for the reply , no I'm not breastfeeding , I did for a few hours but surely that wouldn't effect anything 😅
It's driving me insane trying to pinpoint what's wrong. I know sometimes its just my body getting back to normal but least I've got it seen to and can maybe get some answers

Mine didn't come back until about 14 months pp

I didn’t have a period for 18 months after dc1. I wasn’t breastfeeding. After lots of tests they found I wasn't producing progesterone. After my first period I caught pregnant with dc2 and I had the same 18 months no period.