Hey, i got my tongue pierced maybe over 6 months ago now, and i didnt have any problems with mine - you just haver to be very careful when you get it done that you go to a good reputable place that is clean!!
also make sure you clean it properly - you probably wont be able to eat properly for at least a few days, but anything you have that isn't water just make sure to give your mouth a rinse with warm salt water - and also make sure to do that twice on top of that. - or maybe invest in some non alcoholic mouthwash, just make sure it's not super strong mint.
As long as you go somewhere reputable, there shouldnt be a problem, and as long as you look after it properly!
hope this is of some help to you, emily xx