Hi there,
everyone's withdrawal experience is different. A lot depends on your body's metabolism vs the drug's halflife, and the amount/length of time you have been taking the drug. 3 months isn't too long but I can't say you won't experience a lot of discomfort.
I can only truly speak from my personal experience which is a bit different from what you have explained here, but symptoms of acute wd usually peak at about 3-4 days, and subside by 7-10 days, it could be longer, could even be shorter.
Generally I get really restless (including restless legs at night) and anxious, insomnia for almost the entire duration. Lack of apatite, but I crave salt. Lots of people crave sugar, or can't eat at all because of stomach cramps/nausea. I never have puked from withdrawals, but I definitely get the stomach cramps. Also, lots of yawning and watery eyes, sneezing, sniffles, sweaty (mostly my palms) and being very sore. I particularly get a sore back and upper legs, and knees.
But by far what bothers me the most are the cravings, be prepared to have bad cravings and depression/anxiety. Like I said, it's different for everyone, but I find that the depression and insomnia/lethargy combined with the cravings outweighs the painful physical symptoms by far. It's what causes me to relapse every time.
So I suggest you have something to keep you busy the entire time to avoid cravings. Exercise is a great way to relieve the stress and release endorphins that your brain will be lacking. I know it can be very hard to even get out of bed and get dressed, but it's great to exercise and also stay hydrated.
I wish you good luck on your endeavour, it's not going to be easy, but with determination and the will to quit, you can totally do it!!
