for gods sake plz help! constipation and diarrhea!?

Everyday for the past few weeks I have been constipated or had diarrhea..it’s driving me crazy and I just want to have a normal bowel movement! My belly is real swollen and I have really bad diarrhea now. And it’s not the relief kind of diarrhea. I feel like I’m going to puke all the time. And I’ll be real constipated and then try to make it better by eating something that will make me go, and then get really bad diarrhea. I’m 12. Can’t afford a doctor, and my own mom never even checks on me to make sure i’m eating!! muchless eating normal! and now i’m really sick and it’s the middle of the night and have no one to help me cause my own mom won’t help! Someone please tell me what to do about this and how I can cure it, please help me im getting really worried.