Your introduction describes every last one of us. But let's get to it.
Rage and the family: immediately come here and rant, call us assholes, whatever, it's temporary
Crazy irritability and anxiety: EXERCISE!!!! It can be done, just commit to some routine
Weight gain/control: Don't replace dip with food. Use gum, seeds, fake dip, whatever you need to get past the irritability and wanting to eat.
Your life will be different. Bathroom habits change, sleeping changes (for me several times). Recognize these changes and adapt.
bottom line is right now the nicotine has control of you and your life. If you want to regain control follow the above instructions. Anyone here will tell you the same thing.
PS, my Aunt had mouth cancer from cigarettes, that shit is real, you should worry about it as long as you dip/smoke.