Shitting blood -- should I see a doctor?

New account because I'm kind of embarrassed about some of the details herein.

Obviously in most cases this would be an immediate yes, but here I'm not sure. I've been eating a lot since we've had leftovers ever since Thanksgiving, and hadn't taken a dump for a couple days (since Sunday I think, but I wasn't really keeping track) until just now. I went to shit and had a lot of trouble squeezing it out, so to speak. I finished up and went to wipe my ass, and realized there was blood all on it. A few wipes later though the blood was gone (it didn't keep going) and so I think it might have just been an exterior tear. If it was a skin tear, I don't think I need to see a doctor or anything, but I thought I would ask on here if I should say something to anyone (I'm a minor, living with my parents) about maybe going to a doc.

If it helps I'm 17, 6'1".

I've been sort of sick lately too -- over Thanksgiving I was having sinus issues. And yesterday I had some sort of allergic reaction (I'm not sure what it was a reaction to) which resulted in a rash on one of my arms and my eyes itching pretty badly and swelling up. It also exacerbated a cough that I've had for awhile, and I ended up spending a lot of time doubled over coughing, before it somewhat subsided.