Is it normal for my hermit crab to molt so long?

I got my hermit crab at the end of july. I started studying what to with them, so i spent a lot of money on the necessary stuff for him. I read about molting and I'm still pretty unsure because of it being my first hermit crab. His humidity is always good, temperate too. Since now the heat is on in the house... show more I got my hermit crab at the end of july. I started studying what to with them, so i spent a lot of money on the necessary stuff for him. I read about molting and I'm still pretty unsure because of it being my first hermit crab. His humidity is always good, temperate too. Since now the heat is on in the house because it's winter. He's been molting I think for almost 3 months in 5 days. He's about 2 inches long . The opening of his shell is no more than a penny. I just idk if it's normal. Expecially since it's probably his first molt since being taken from the wild. It's a stressful thing and I just wanna be prepared. I've been calm so far.
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