If your pelvis is out of alignment then there is a good chance the pain is being caused by pressure on one of the nerves. When I get that kind of pain in also hurts behind my knee and my toes can feel numb. It can be very debilitating some days.

I would advise you to see someone about it sooner rather than later. The earlier you get treatment, the sooner it will improve and it will take less treatments. Also think about how you do things. Use fluid, purposeful movements and keep your pelvis even, ie swing both legs out of the car before you get out etc.

Pilates is great for getting some strength in our lower back/pelvic region also. It's easy for beginners and low impact.