Lump On Outside of Sphincter

Hi, i'm an 18 year old male and I noticed something very disturbing yesterday. After I did #2, I felt some pain in my anus area.

At first I thought that it was because I usually have large stool that ends up blocking the toilet, until it kept on hurting for the next 6 hours.

When I took a shower I felt down there and discovered an elliptical lump about the size of a small grape protruding from my anus/sphincter. It hurts to touch, which i'll assume is because there are quite a few nerves and membranes down there. The lump didn't appear to be very solid, though when I woke up today I checked and it has gotten more fleshy and hard. Are there any suggestions as to what this might be? (i also noticed that for the past month i've been feeling extemely tired when I have had plenty of sleep...)
i have never had any problems like this in the past, nor do I have a family history of colon cancer or any other kind of diseases. Unfortunately

i also don't have a family doctor here since I moved to ottawa last month for university, so if it comes down to it, do I just walk into emerg and tell the triage nurse? (i've never been to the hospital by myself, since the last time I went was about 5 y.A).