Welcome to the forum! I have been dealing with abscesses myself for a few years now. Back in 2011 I had two surgeries for them within 3 weeks and spent 10 days in the hospital. I ended up with a 7.5" incision that still heals today. Mine was an extreme case though so its likely yours isn't that bad yet. However, if it goes untreated for too long it can definitely get bigger/worse. I ignored mine for a few years until it got so bad I couldn't walk and I was rushed to the hospital by ambulance after my body went into shock.
I would see a doctor for it if you haven't already and my personal first choice would be to get on Cipro and Flagyl because some people do have success with those meds and therefore can avoid surgery. If not, your doctor might need to lance/drain the abscess but this can usually be done as an outpatient procedure with a short recovery time of pain/discomfort. Despite how big my incision was, it was night and day after surgery. I felt a million times better.
Also, don't ever worry about too much information here. The crohns forum is a place to share your stories that you would otherwise be uncomfortable sharing with others. We are all either IBD/IBS sufferers, or supports/parents of somebody with IBD so nothing is gross for us. Actually, the more details provided the easier it is to help.
Best of luck with everything