A week in, am I supposed to feel like this?

It's been a week since I've inhaled any nicotine not in the form of gum or a patch. I feel TERRIBLE. Like I'm sick almost but I know I'm not sick, I feel bogged down and tired and kinda like a blob almost. Just heavy and like I'm moving kinda slow motion. My sister told me it's most likely the start of my body getting rid of all the nasty gunk but maaaannn. Did/Does anyone else have it going on? What helps? Do I just need to tough it out a few days and I'll be golden.