Keep having flashbacks of my abortion

I had a surgical abortion at 11 weeks 3 days ago, and I feel like I never left the clinic. It was horrific. They gave me medication and told me to expect period cramps and nausea, I ended up outside vomiting and barely able to walk back inside I felt so weak and sick and I was in so much pain. Diarrhoea was horrific and I basically collapsed inside the toilets and they had to wheel me up for the procedure early. I keep seeing it. I keep seeing myself curled up on the floor vomiting and wanting to take it all back. I don’t know how to deal with this. I’m alone and don’t know how to move forward.