well, at 5 weeks it is really quite early to feel anything happening.
so its most likely all in your head.
you should get some pregnancy books, and possibly take a lamaze class-preparation for labour and baby class.
it can teach you alot about what to expect, how to breathe while in labour, how to channel the pain, what to do with a new born baby, what you will experience during pregnancy, it could be really educational for you.