K.B.
Bruising and aching joints can be caused by low iron. Pregnant and breastfeeding women need more than 2x's the amount of iron men need. If you're not taking a good quality prenatal, I would start there, they have the nutrients you need. Dr. Tori Hudson has a multi vitamin I think it's called maternal support or something close to it and it's made for breastfeeding moms. I got it at Nugget, the bottle looks a little hippy with a drawing of a woman on it. Perfect Prenatal is another good one. If that doesn't help I would go to the doc for some labs.
K.