HELP! Failed D&C?

Has anyone experienced a failed D&C procedure?

This is my third pregnancy, which was unexpected, yet welcomed, until we found out via an ultrasound that I lost the baby and was going through miscarriage. The following week, I started bleeding and cramping and passing tissue and blood clots. It was enough to think the miscarriage was complete until 5 days later I was back at it again with worse cramping and way more tissue and blood clots, an entire solo cup of blood clots passed when my husband no longer allowed me to continue on my own and brought me to the ER. I spent 12 hours there, had two panic attacks during my stay and at the 10 hour mark they asked to do a D&C procedure. I was doing everything to avoid it, I have a lot of fear as I have never had any procedures, and hospitals do not make me comfortable (My first two pregnancies were successful home births with my midwife). They also offered me to take the medication and wait to see if I may do it on my own but they were certain I would still need the procedure and also a blood transfusion. I allowed the procedure, and I was put under for it, as I was not in a good head space and was afraid I may have another panic attack during the procedure. I ended up needing two blood transfusions after the procedure (and it didn’t even get me out of the low), but they sent me home since I was doing better otherwise. Fast forward to last week when again, I started to not feel well, I was very weak, my BP was really low and I started to have lightheadedness, and vision impairment in the evening for a small amount of time, later that night just before I went to bed I passed yet another blood clot. I feared going back to the ER, my kids were already asleep, I didn’t want to go without my husband and had no other middle of the night childcare options, so I chose to stay home and call the dr in the morning. I spoke with them, and they ordered an ultrasound for that same evening, and the next day (yesterday) I would see my dr to go over the results… Which determined somehow there is leftover tissue still in my uterus... I am in shock. Why is this still happening?! How did the other dr miss tissue?! My doctor now prescribed me medication, which was the alternative option I had not done previously, but she warned me that I may need another procedure. I am very upset. It has been a month and one day since I originally found out of the miscarriage, and I’m still suffering and going through it! I am being fairly open with my experience, and I have found many woman that I know and have told, that have also gone through miscarriage but they don’t typically share their story, which I understand but I am wondering if anyone else has ever experienced anything like this? I don’t know what I’m really looking for with this post, but I’m just working through this trauma with a lot of heavy emotions.