you know what...in the last month of my pregnancy I couldn't even walk. I had some pinched nerve or something.....but i really feel for you:/ hang in there, it's almost over;)
The first time doing it, get vaseline around hairline!!! If your hair is natural , apply first to mid shaft(2-3 inches away from the scalp) pulling it to the ends. On the end apply to the root.
If reapplying start on the root and DO NOT put it on the ends. On the last 5 min you can mush...