I feel like a relationship killer 😔

Back in 2009 I was diagnosed with severe anemia. I was supposed to get a blood transfusion, that's how bad off I was, after my doctor told me I was supposed to been dead. My doctor didn't even know how I was still alive, but trust and believe, I do!!! So now dating head been a complete mess. My ex understood, but I ended up leaving him and now my current boyfriend can't stand it. He says it's freaking him out because he can't wake me up after a few hours after we've had sex or I fall sleep too quick. I've had iron infusions and had been on that treatment up until the beginning of last year, but it's not helping! I don't sleep as much as I did then because I work now than 12 hours a day...since then I've been diagnosed with pcos along with a few others...I'm not sure what to do...my doctors haven't found a solution for me yet, but I don't think they ever will...it's been what 8/9 years...any suggestions🤔