Is this Lithium side effects?

I am a F33 165cm tall I weigh 76kg have been having a lot of shaking since my lithium dose has been upped from 500mg to 750mg and I am concerned it could be a side effects of the medication but I need the medication as it's the only thing that is working for my bipolar 1 disorder I am also on 6mg paliperidone as I have psychotic symptoms of visual and auditory hallucinations I am also on 50mg noritriptyline for my chronic pain and 10mg of zolpidem for my insomnia is it the mix of medications causing the shakes if so I need all of these medications so could I be put a medication to help with the chronic shaking that I have gotten I also have been having jaw problems which is causing my speech to be a bit slurred and I have been talking slowly as I have problems with the spead of my thoughts and been very tired and jumpy I do have cPTSD and possibly DID I also have a tooth infection so I'm on amoxicillin trihydrate 875mg clavulanic 125mg twice daily