I Was Taking Gabaneuron 1/2 Tablet 2 Daily, My Doctor

i was taking gabaneuron 1/2 tablet 2 daily, my doctor increased it to 1 tablet 2 daily, today was my first day after increasing the dose, i was sleeping whole day, my response was slow, feeling very week, not able to stand or sit. my body response was zero. he has also advised me to take altraday before dinner daily, which i started from today.
My main problem is that i am having pain from below hip to knee and in calf muscles in right leg.
This happened after my physiotherapist increased the repletion of leg raise exercise which is done while sitting with towel below the knee from 5 res to 25 reps.
Due to this pain i am not able to walk as the pain increases a lot and is unbearable, after this pain has developed i lost control on holding my urine for long, and not able to hold urine at all once there is a pressure on my stomach. Even when i am now trying to move towards the end of bed to go to washroom , i leak though i know before hand that i need to go to washroom.

Need advise to get relief from this deadly pain in my leg and have my urine control back.

i have lumbar spinal stenosis due to which i have been advised physiotherapy.