Spotting at 5 weeks 1 day

5 weeks 1 day pregnant after a MC September 29th. I'm so scared as I just noticed light pink spotting when I wiped. It was a small small amount buy nevertheless less it scares me! My hcg is doubling (it wasn't doubling back in September when I had my miscarriage) but I know things could still go wrong. I'm going to request more blood draws for hcg levels for some reassurance. I do wonder if maybe me lifting my client (43 lbs) could have anything to do with the spotting. I lift him on a daily basis though so I'm not sure why it would be affecting me. I'm also crampy, but nothing unusual, as I've been crampy on and off.. Any advice?