Knees hurting after pregnancy?

I’m 10 weeks pp and started running again a few weeks ago. Lately even running 1 mile hurts my knees. I’ve never had any sort of joint pains before. Pre pregnancy I ran 2-3 miles every other day with no problems. I do weigh about 15 lbs more now than I did pre pregnancy so I’m sure that doesn’t help. I read that this can happen as a result of pregnancy and breastfeeding hormones and I’m wondering if anyone else has experienced this? Did it go away when you stopped breastfeeding? Or am I doomed to have knee pain now? Any advice?