I noticed that my arm and leg feel like it is going a little numb when I carry my 6 week old in the moby. I wonder if I am pinching a nerve when I wear it? It isn't completely numb but feels like my circulation is poor. I love wearing it and would hate to give it up!
I never got the hang of a wrap, was more of a MT, SSC, and RS girl. So, hopefully someone more experienced with wraps will chime in. However, I once suffered through a few pinched nerves in my shoulder after carrying a sick baby for a couple days straight in the ring sling. I like my carriers tight, and it was more than my normal usage, so those were definitely contributing factors. But seriously some of the worst pain I'd ever been in. I'd make sure that everything is even, the fabric is spread out as much as possible, and that baby isn't hanging too low. With my MT, strapping DD on in a high carry helped alleviate a lot of strain on my shoulders and back.
ETA: I know the feeling you're talking about. Not numb, but definitely not right. I ignored it and ended up with pinched nerves. That's what caught my eye about your post. Hopefully someone will respond who can actually help you adjust the wrap!
Wife to DH and mama to DD(7) and DD(5) ...Lola the Wiener Dog , Faulkner the Little Giant , Ginger the Wonder Cat , Azkaban the blue parakeet, Sunny the yellow parakeet, 3 nameless hermit crabs, and a whole bunch of fish!