General practitioner. Hah! May as well see a witch doctor.
First off, this injury is common when you deadlift........ if your form sucks. Been there, done that a few times. Could barely get out of bed. I will bet a George Washington that you let the bar drift out from your body, changing your center of balance and putting all the strain on your lower back, where it should never be.
If you don't have a copy, go buy or get Starting Strength by Rippetoe. You can read it while you recover. All sorts of great deadlift info there.
Use ice packs a few times a day to reduce inflammation. Rest it. Go for walks. Massage, preferably by a Victoria's Secret model but you mom will do as well.
It will come right, be patient. You will definitely have mental issues with lifting for a short while but you gotta get back on the horse, just don't gallop first off, ease into it and keep your form strict, dragging that bar up your shins.