wth is wrong with my body?

Mizz_Reeni • °~•~°○Undercover Unicorn🦄○°~•~°

not sure if it's a pregnancy question but. I've been having irregular periods for 3 months. prior to that I was as regular as you can get. since August, I've been having bleeding every other week (literly one week on and one week off) I went to see my obgyn and he ran some blood tests and everything came back negative except my platelet count is super low (platelets is what causes your blood to clot when it's supposed to & mines are super low) I was also checked if I was pregnant and it was negative. I had an ultra sound done and everything is normal too. not only am I confused but so is my obgyn and my primary care Dr. so now I'm going to a hemotologist who specializes in blood disorders and he said he thinks it's ITP (something to do with my auto immune) and i have to take steroids to bring my platelet count up..... so now I'm in the situation where I'm 8 days late on my period and I'm not sure if I'm pregnant cuz I don't have any issues and I haven't taken a pregnancy test yet (which I will tomorrow) and the steroids I have been prescribed is not supposed to be taken if I'm pregnant. I'm so confused as to what is going on with my body internally. for 3 months straight i keep having periods and this month I don't get anything. has anyone had this issue, or similar please give me some insight