Digestive Health Condition?

I would really like to know more about how my digestive health's condition doing.I am 18 years old.My bowel movement seems to be very moist but it comes out very difficult-It's straining to let it out.The size of my bowel movement is as thin as my fingers which is worrying me.Usually,I would bladder once a day and this doesn't seem to be normal.I've had a terrible Acid Reflux for the last 3 months but not one medication helped me stopped it.Today,it's not as worse as before ever since I started having a healthy diet.I only eat sea foods,fibres and staying away from foods/drinks that can trigger it.I don't know if I should go and check with the Doctor again because none of the prescriptions worked for me.I'm not sure what I should do.I'm afraid to do a check-up cuz I might have to get an endoscopy or so.With this bowel movement condition,I'm not sure which step I should take.Please help me,thank you.