Hmm,hello.I want to ask for advice.

I have been having bowel problems every time I use the toilet for about three weeks now. I usually go to the toilet once a day since I moved to Canada at the beginning of last year. Before that, I would go once or twice a week. Where I come from, I eat a lot of vegetables, but my diet is mainly carbohydrates like rice, both then and now. I told my mother, and she said she would ask my grandmother for advice. I just want to know if I should seek medical help. It is really painful when using the toilet. I don’t want to go into too much detail, but it feels like someone is putting something up my you-know-what.Also I am in my mid-teens if that useful info and I use the toilet on Sunday.