Dors it hurt? Is it itchy and red? We're not doctors and we can't see what you're talking about, I don't think you're in imminent danger of dying, but I would definitely get it checked out...
Also, the person who shot you up doesn't sound like they're very adept with the needle. I'd donsider learning how to do it yourself, finding someone else who's better at it or stop playing with needles altogether....Pills are the worst thing to IV, some lend themselves to being IV better than others, but even those pills shouldn't really be IV's....If you're going to do, you should use the utmost precaution in regards to filtering and cleanliness practices.