Is my rednose pit pregnant?

Question
I,mated my 20mo.rednose pitbull 11-14-09. At the beggining it seem
as though she was a expecting mother..her tits got a little perky not to much. I let her run full speed with other dogs jump & play.
Could this have caused her to have had a miscarriage? She peed in the snow and i noticed blood in her pee plus around her womb. I can't afford to take her to the vet at the moment. plus give some advise to what you think.

Answer
Hi Timothy

Exercise in moderation is always advised.  But rough housing, bumping and running at top speed could in fact cause a female to miscarry.

If she's bleeding this late in the came I would be concerned. If you can't afford to take her to the vet, be prepared to lose your female.  If she has dead pups inside her, they will become toxic.  

Good luck