Left side of neck is so sore, can't move it, severe headache and sore throat. Neck and head throbb when I lay down. Can't sleep?

Sore throat. For significantly sore throat w swollen tonsils / lymph nodes – see physician & get a strep throat test & culture. Antibiotics are imperative for Strep Throat. Try saltwater gargles. Mix tsp of salt in 8 oz of warm water – gargle w this several times/day. You can gargle w Aloe Vera juice a couple of times per day. A mix of chamomile tea w honey & a small amt of lemon juice helps.