Why can't I be normal..

I'm so disappointed in myself, I'm a full time student and I work full time. I recently found out I'm pregnant and I'm considered high risk for the first trimester because I have a MC history. Before I found out I was pregnant I was on heavy doses of adrenal and have been my whole life. Since I'm high risk my dr thought it be best if I stopped completely taking my adrenal. Since I've been so dependent on it for so long I can't focus at all without it and ended up having to withdraw today from my calculus and chemistry class I was enrolled in. I know the pregnancy will be completely worth it I'm just really upset that I can't be normal and function without this medication it's got me really down today. 😭😭😭