Help please health issue ? TMI

I had a baby 11 months ago and ever since I’ve been having problems with pooing I’ve had a scan on my tummy and also a camera up my bum but apparently everything looked normal up there.. so I have to wait until February to be seen again I get extremely bad pains in my stomach and also above my vagina i get really bad pains sometimes when I have sex and after sex. Not sure what is wrong with me I’m just always in agony :( I asked for another scan and they won’t let me ( doctors refused ) cause apparently I don’t need one so I have to see a specialist again who I saw before like 8 months ago and he just pushed down on my tummy and said I have a lot of poo in my tummy or something which is why he sent me for a camera up my bum. But another question I NOTICED today when I was laying down I was feeling down on to my stomach with a little bit of pressure and just around my belly button area I can feel like a pulse or a heartbeat or something it’s really strange. Is this normal 😭 I am so worried as I have my little boy to look after I’ve been taking things to try help me poo but it’s not working and when I did poo it looked really bad and it smelt here is a picture down here.

Sorry it’s gross

Response for Cathy : when I first went there they did feel around my bum and she said it was fine so really not sure what’s up and I’m really worried about the pulse I’m feeling in my tummy also get side pain in my right side on my stomach