Is this a side effect from the carbamazepine

I’ve been on carbamazepine for over a year now, only taking it when I’m having flares. I guess I’m lucky as I don’t suffer dail. But recently my dr upped my dosage from 200mg to 400mg. I know that seems a small amount for some of you. But since then my knees, hands, elbows and shoulders ache. My hands go numb and tingle like they’re falling asleep. I’ve always had a hard time taking medicines, my body seems to be more sensitive. Any suggestions? I hate to run back to the doctor again, as money is a little tight at the moment.