Feeling great! - Weird inner buttock pain? Help!

Hey there guys! It's been a minute. I'm having an odd symptom which has become more prominent over the years. I feel as though I've experienced it before but it seems to be getting a bit more frequent.

Quick context: I have severe pancolitis, was diagnosed in 2018 and hospitalized for two months due to blood loss. Since the Entyvio has been working (been on it for over a year now), everything has been great. No remission yet, but next week I have a doctors appointment where I'm sure they'll want to test my Entyvio levels as well as schedule me for a scope to see how the inflammation has been doing.

So now, here's my issue. I have a strange pain that comes and goes, isn't frequent, that I've experienced prior to ever being diagnosed. But it seems to happen a bit more now. It's not horrible, it's nothing I'd medicate myself over, but it does scare me, given the UC cancer risks. I've never mentioned it to my doctor because it's so random and infrequent and I always forget it even exists.

Issue: (graphic, kind of?) On my inner buttcheck (yes towards the butthole) on the right side, I get a random throbbing pain. It'll be like one pulse and bloop, it's gone. Like BOOM RANDOM PAIN (not a horrible amount of pain or anything) just a single throb of discomfort, and it's gone. It's not on the exterior, definitely feels "deeper" than that. It's not rectal related, not skin-related. Just feels like a deep random between my buttcheeks on one specific side.

I've had tons of inflammation in the past, so I can easily differentiate between what's ulceration pain, what's irritation pain due to too much wiping, what hemorrhoid pain is, etc and this one has me stumped.I'll be mentioning it to my GI doctor next week but has anyone experienced anything like this?

Next week when I see my GI doctor is when she'll have "the talk" with me, to gauge how I've been feeling since the Entyvio schedule change from 8 weeks to 4 weeks, (haven't seen her since last year). I assume she'll give me an Entyvio test kit to have my nurse draw my blood just before my next infusion to test how the medication is sticking in my system, and I also believe she'll schedule me for a scope to see how things look. I feel great but I hear that UC patients can "feel" great but still have very active inflammation.

My only current issue is probably a hemorrhoid (small one) that I've had since my issue was diagnosed (probably from the constant scopes and bathroom trips). It's not super visible but I do feel it prettttttyyy good when I wipe.

We can get internal muscle spasms along the intestine which are pretty painful, and antispasmatics like bentyl can treat them.

Is this pain associated at all with pooping, that is occurs before, during or after poops? Or does this pain occur randomly during the day with no association with pooping? Peri-anal complications of IBD (hemis, fissures, or abscesses) are more common to be while you're pooping and/or while sitting. Spasms are more prone to be randomly throughout the day without any association with pooping.

On a scale of 1 to 10 (with 10 being call me an ambulance ASAP), how bad is the pain? Various gas pains and trapped stool pains are on the very milder end of the scale.

More info on Peri-anal complications (most often associated with Crohn's but can occur to UC patients as well):
https://www.ncbi.nlm.nih.gov/pmc/articles/pmc2780223/

Could it be a referred pain from somewhere else? Like a trapped nerve near the spine or a tight spot on a muscle close to a nerve can set off pains in all sorts of remote places.

I have tons of Bentyl here. I'll go ahead and try it and see if it helps!

I get this pain as a PMS symptom. As the above article mentions. It's worse when I'm flaring. Period cramps coincide with weird stabby butt pain.