Alarm won't stop going off

Hey everyone, I have a 1997 Pontiac Sunfire with about 240,000 miles on it. I recently had to tighten the positive terminal on my battery, which I think reset the alarm. Right now the alarm goes off constantly, will shut off, and then go off again after about 10 minutes. It's getting to the point where it's draining my battery, what can I do to stop this?