Baby poop! Black specks

Hi everyone,

I was hoping someone may have some advice or input on my current situation.

My daughter is 4 months old and breast fed. She had her four month vaccines two weeks ago. I’m not sure if it’s related at all but wanted to mention that. Since then, she had REALLY mucousy poos and started having episodes where she was in excruciating pain, crying, pulling her knees up and smacking her stomach. I took her to the peds 3 days after bc her poo was just pure mucous and her episodes were quite severe, and they sent us to the hospital to have an ultrasound done to look for something called intusseption. She did not have this - or it didn’t show up when doing the scan.

Fast forward a week and a few days from then, her episodes are getting worse, she is pooping every 3 days and it’s now filling the diaper as if it’s pee but still the coloie of breastfed baby poo, but has black specks all over.

She has been arching her back and becoming stiff as a board when the episodes happen now and screams in what sounds like pain.

When she is happy she is really happy and fine, but when this happens it’s really hard. I am starting to get more concerned bc of the black specks in her poo.

The doctor is recommending an ant acid which she believes won’t help the black specks she thinks is blood, but will help her vomiting (my baby is a spit up / puker lol)

She just said to monitor it and come back if it’s getting worse. But in my opinion it already is as we’re suspecting old blood in her stool… I just don’t know what to do. I want more investigation bc she is in so much pain when these things happen and clearly something is “bleeding” up in there.

Has anyone experienced this? I am unable to attach pictures for reference.