Feel like an awful parent as I have no idea what else I can do!!

I’m really starting to struggle not knowing what’s wrong with my little boy (10 weeks). He use to be so happy and content and this has just gone down hill. He’s coughing fits daily, sneezing, blood in poo (he’s breastfed) and just sleeping CONSTANTLY through out the day, not wanting to feed from me, crying when awake. I have no idea what I can do, doctors have been NO help, we’ve been so many times. He had Bronchilitous about 7 weeks ago, not sure if it’s coming back. No idea what to do, no one is listening or helping! Does anyone know what this could be? Or what the heck I can do!

No health visitor, no checks etc due to COVID 19

Pics of poo below (sorry for TMI)