Constipated with diarrhea. im never normal :( everytime i cant go poo one morning, i end up with a stomach ache and diarrhea after dinner. im 18/femal?

Possibly IBS: Irritable bowel syndrome can manifest as alternating periods of diarrhea and constipation, which appears to be demonstrated well in your symptoms. You may want to try to reduce your daily stressors to a point where you can handle some, ad you may try meditating in a quiet room to limit your anxiety. There are some meds for IBS, but it's best to try the non-pharmacologic method first - it's cheaper