Go see an orthopedic surgeon, preferably one who specializes in shoulders. The problem is there and it's not going away, and every time it pops out, it makes it that much easier to happen again in the future. You probably will be a candidate for surgery, especially if this is interfering with your lifestyle. If the doctor is conservative, he may send you to physical therapy instead, to try to strengthen the musculature around the joint to lessen the likelihood of this happening again. But that may not be an option, depending on what's going on in there.
Now that you're a recurrent dislocator, I wouldn't mess around. Every time you do it, you're damaging the joint capsule even more and making it looser and looser and more likely to pop out again. Depending on the severity of your dislocations (now or in the future), there's the potential for damage to neurovascular structures, ligaments, the labrum, the head of the humerus, etc. -- basically things that you want to avoid damaging if you haven't already.
I'm unstable posteriorly, it subluxes on me in certain positions, feels like it's on the verge of going out, if you know what I mean. You sort of instinctively learn what motions to avoid, but I still feel like it's a ticking time bomb sometimes. I dread the day it finally goes out.