Take a cold shower and stay in under the shower for as long as you need to.
I think you are also very anxious and afraid you might never recover. Invega takes away access to parts of your brain so that makes it much harder to think positive and hope you will recover. You must start telling yourself not to panic, relax, in 8 to 12 months time you will start finding life more tolerable. Once you relax and not think about it for a while, it may help you sleep.
This is a short bump in the road of your life. You are a strong person, you tolerated 5 months of invega torture. Keep going, you will get through this.