Congratulations on getting this far with your taper. With any taper, there will come a time when the person has several episodes of 'mini-withdrawal' during the day as each dose wears off-- that is the time when it is best to just stop taking the medication altogether. As Nick said, you SHOULD feel better after a couple weeks, although there are some people who have effects lasting for months.
The 'sweats' can be very uncomfortable; you describe them as 'cold' sweats, but some people find relief by running cold water from the faucet over their hands as soon as the sweats start-- this sometimes 'breaks' the sweating episode. I have had some success treating the sweats from opiate withdrawal using neurontin (the generic name is gabapentin); this medication is pretty safe and is not a controlled substance.
the sooner you stop taking it, the sooner these symptoms will cease. at most they should last 7-10 days. if you need more advice, please post this in the addiction:substance abuse forum. there are tonnes of ppl there with lots of experience.
best of luck to you.
nick