It's not possible to predict how these 4 psych meds will counter-balance each other. Your doctor ordering these meds knows at least as much as the friends who expressed their concern, which I think is valid. If your doctor knows about your history of being hospitalized for mania, then this doctor is likely already mindful of you being at risk for a recurrence of mania.

Drugs don't determine everything. Try to focus on having a plan for daily activity. Some days you might be able to accomplish only one thing. But give yourself credit for even that. Some days it can be a major achievement just to shower and wash your hair. It is so tempting to think that "First I need to feel better, before I can focus on getting anything done." (I get that way myself.) The reality is that often we need to change how we are behaving in order to change how we feel. "Fake it, till you make it." - can be good advice. I hope your anxiety is easing up.