My son was born 4 weeks ago and about a fortnight ago I started getting really awful pain in my hips, legs and bum. It's especially bad when I walk down the stairs and when I first get into bed at night. Is it spd? If so what can I do about it/who can I see? I'm really in a lot of pain and I'm worried that there's nothing that can be done. I'm only 21 and I don't want to be crippled for the rest of my life :(!