Yes it is normal and yes ice it for now. Later tomorrow or the next day, start using some moist heat. Just soak a towel with hot water, ring it out, then apply it where ever it is swollen. A 600 Mg Motrin would be good also for the swelling if you are not allergic to aspirin. It will keep the massaged area lose, and the swelling should go down. You might also want to rub those areas with Aspercreme Cream, again if you are not allergic to aspirin. The next massage will be better and not hurt as much. A lot of pressure has to be applied to a tight muscle with knots in them, so it will hurt. I've never seen anyone swell as bad as you say you did, but some swelling does occur. You need to follow up with a few more massages to keep those muscles lose. You also need to keep those muscles stetched which can be accomplished by laying on the floor, place your hands at the back of your head and sit up slightly, not a full sit up, just up about 5 or 6 inches from the floor. You can also grab something higher than you are like a set of monkey bars at a playground, and just hang from them. This will stretch your entire back and spine. Best to you young lady.