OHSS and IUI

I had my iui procedure this morning. My medicine regimen was letrozole followed by 50iu of follistim injections for 6 days and then I triggered Friday night. All was going well, I went this morning and had the iui done and it went fine. About three hours later, I ended up with severe cramping and hours later am dealing with major bloating, abdominal pain/tenderness, and GI upset. I called the on call doctor and she said I am experiencing OHSS. Well, I’m totally freaking out and pretty physically miserable. Has anyone experienced this? Please tell me your stories and leave any advice. I’m so freaked out I may not continue treatment after this cycle, successful or not. I’m almost afraid for it to be successful at this point.