I I Have Been Having A Lot Of Neck Pain

I I have been having a lot of neck pain and extreme vertigo especially when I lie down or bend my head back or forward. I had a cat scan which showed a swelling in my submandibular gland. The dizziness is horrendous and I can't sleep. I also have severe nausea and regurgitation. Pain going down my left arm. Ongoing for two months now.