35 weeks and feeling sucky. But is it normal?

Its 12:27 and i cant sleep. this time its not the "i can barely breath when i lay down" or "my ligament pain makes it hard to get comfortable". Nope! To night im feeling nausea and i have a headache. My neck feels tense and i get dizzy just moving my head up and down or from left to right. I feel like barfing! I dont recall feeling like this my last pregnancy. I also lost my mucus plug today, that was nasty.I feel horrible and it feels so hot in here!!! This is normal though right?