Please keep BaalHabooze’s advice in mind. If the painkiller you’ve been prescribed is not working, do not try to take more than the recommended dose. Some painkillers have terrible side effects when too much is taken, such as slowing down or stopping critical functions (like breathing). Instead, call your dentist and request a different type of painkiller. Some types work better than others on different patients. Everyone is different. Ice, of course, is a good idea as well. But as far as meds go, you might need a different class of drug and only a licensed practitioner should be telling you that.
Best of luck to you.