You are taking 20 mg of hydrocodone per day--- a low dose of narcotic. To put it in perspective, oxycodone is 50% to 100% stronger, and a typical addict who comes to my office for help is taking 100-300 mg of oxycodone per day-- sometimes over 500 mg. So I would expect your withdrawal to be relatively mild.
BUT-- everyone hates opioid withdrawal, and even mild withdrawal is miserable. You will likely experience a very strong desire to keep taking the medication, and an inner restlessness for days that cries out for hydrocodone. I strongly encourage you to stick with your plans though-- the cravings WILL go away, probably in 2-3 weeks (the worst of it will be over after a few days). By the end of a month you'll feel 100% better.
sounds good, I can deal with a desire to take it, as long as I don't have the sweating, unable to sleep, crawly skin as I've read. I'm pretty strong person, when will the little withdrawl start?