OT: Ovarian Cyst?

Sorry, this is a bit off topic, but you all have been the most helpful that I have found and I've already learned a ton from you.  I'm just hoping to get some opinions.

So, ever since I can remember, I've had left side pelvic pain which manifests as mostly just a dull ache around my period.  Never really bothered me.  I would just feel a "twinge" every once in a while.  I think I mentioned it at my yearly years ago and nothing was found abnormal on exam. 

I went of the BCP in February and ever since, I have been noticing more left-side pelvic pain and not just when I'm on my period.  It's just to the inside and slightly below the protrusion of my hip bone.  I can illicit pain with palpation, but not enough that it's excruciating or anything like that.  It's not interfering with my day at all, I can just notice that it's there.  No pain with sex or urination.  No issues with menstrual cycle, other than period coming 4 days longer than normal last month.  Pain seems to be more prominent when I have a full bladder or bowel.

Anyone have any ideas?  My mom had a long history of fibroids which resulted in a hysterectomy last year @ age 48.  She had a history of extremely heavy periods, which I do not have.