Hello my name is ***** ***** certified computer professional with over 10 years experience. I will be happy to help you.
If you log into your paypal account at https://www.paypal.com/ you will see all of the transactions on your home screen on the right hand side. If you do not see the one you are looking for than it most likely didn't go through.
If you would like please let me know who you made the purchase from and if it was through a website like ebay for example.