Gut issues. Should i consult a doctor?

20yo: Constipations/diarrhea/mixed stool, dark brown stool with  jelly mucus, mid-belly pain relieved by pooping, stomach/abdomen bloating, abdominal pressure pushes fluid to throat, empty-stomach milk causes diarrhea, 3-4 smoke puffs cause nausea/vomiting/mouth-liquid, brief anal burning during/after stool, back acne, past mouth peeling. Seen blood on my inner wear probably anal fissures Before these symptoms i was suffering from consistent constipation I have OCD also , which worse the gut  health When I smoke at night and wake up on morning , there is more mucus coming out than when i don't smoke These above mentioned symptoms were first , but from 3-4 days I have changed my dietary plan , no spicy foods , more water intake , but currently sedentary, no smoking , sitz bath of 15 mins daily , now i feel relief and recent bowel movement were normal stool , no blood , less abdominal pain , less burning sensation around anus ,now cautious about my food , ...should I consult a doctor???