Look up the symptoms on the NHS site Nas,keep away from random sites,one thing I would tell you to avoid is seeds & the like,like seeded bread etc,these are the little blighters that can cause a flare up.
This last flare up I had , I was physically sick and not only was my side sore to touch but I woke through the night with pain on that left side. I would advise just asking the Dr if you need ABs,it's the only thing that will shift it