Generally the doctors recommend no heavy lifting but it all depends on the person. If your body is used to doing this work, it probably can handle the strain better... I would talk to your OB about it and see what they recommend.
I am a cna as well and work in a very full, very under staffed nursing home. I was worried about the heavy lifting and what not as well but I am now 9wks 2ds and have had no spotting or cramping so I don't think the heavy lifting and fast pace has affected my baby at all. I don't go to see my ob until the 23rd but i feel as if everything is going just perfect with my pregnancy. I have also known 3 girls that have worked where I do through their entire pregnancy with no problems. I really wouldnt stress about it too much!
hey i recently had training and passed for a DSP (direct support professional) similar and possible fancy word for caregiver. the person i support needs to be lifted and carried in out of chair bed. everywhere. im kind of in the same boat. just, i dont know if i am not not. i posted just before yours i believe.