Need advice

I'm 10 weeks and 2 days pregnant. I'm a caregiver at a board and care home for the elderly. When I first told them I was pregnant they lightened my work. The other caregiver I work with would help me lift. Now for the last 2-3 week for 2 days out of the week they have been setting me up with a 65 year old caregiver who can't lift at all so I've been stuck doing it. I've been so upset with my administrator because he knows I'm pregnant yet still makes me lift. Lifting has been causing me a lot of sharp pains on my left side and I'm scared I'll loose my baby. I need the money so I show up to work hoping they find someone to help me. I even gave them a doctors note stating that I can't lift anything over 15lbs. Should I go to the dr to get checked and to make sure my baby's fine?