I bought a 1.5" bluering leg centipede about a week ago and it hasnt been active for 4 days. It just sits in its tunnel it digged on the side of the wall in the substrate and doesn't move from there at all. Its not eating crickets or drinking water either, and also it stoped coming out at night to walk around. I noticed there was a lump on the 7th segment from the tail. Im wondering if its about to molt?