this is far from the first time i've heard about piercings from blue banana becoming infected.
i'm not saying don't go there, but just make sure you ask plenty of questions about sterilisation etc. Just wanted to warn people that some BB stores don't seem that scrupulous, so be wary. I know they're cheaper than a lot of other piercers but if you have any doubts, it's worth it to pay the extra.
i'd say leave it alone as much as possible, except to apply salt water and germoline once per day (salt water in the morning, germoline overnight) and if it gets really bad, just take it out as that's the best way to avoid nasty scars i'm afraid
hope this helps