Struggling with Anxiety, Eating Habits, and Mood Swings

I have 2/3 things to share but today I was getting back into a school routine and I was having bad anxiety and took medication but I don't take them alot and I got nashious. I'm not sure If its the anxiety or if I should do something, I know I need to be taking my medicine regularly but I have a hard time reminding myself. The second one is about my eating I used to eat everything because of stress but now I barley eat, I feel sick alot when I eat. I ate less to lose weight I'm down 20 pounds but I feel weaker, I know I'm hungry but I don't even think to eat I want to take care of myself both ways but I don't want to lose progress if I start over eating again. last thing I have pretty bad mood swings I'm almost always am a kind calm person but I learned I bundle up my emotions to much that sometimes I blow up like angry or sad, it more difficult with angry I won't hurt anyone but I'll definitely yell at them my mind won't be there I'm just yelling then when I snap out of it I just feel awful because that's not some kind of thing I'd do I take meds for moodswings but sometimes it dosnt work I feel bad even if I wasn't there when I yelled at them it might not even be about them and it's ruining my friendships. it's stressful and I'm not sure how to handle it because I feel overwhelmed alot of the time and alot of people like and depend on me so I don't want to make a mistake and mess up with more people to because I can't let out my feelings. there's some people I want to apologize to for my actions but I'm not sure how to approach I just wanted to tell them that it wasn't them it was me and they didn't deserve that even I'd I don't get forgiveness I want to apologize for myself atleast to let them know I feel guilty