I Have Had Sleep Paralysis

I have it a lot. I wanna say at least 4 times a month for maybe eight years. At first I thought I was having a seizure but then I learned what it was. I have learned to cope with them, though. I shut my eyes and control my breathing whenever it happens. It usually goes away within a few seconds. But the last attack was really intense and I think I was still imagining things. I thought that only happened if your eyes were open?