How can I get over the fear receiving upper dentures?

Desensitize parts. First, become aware of all the benefits of having those dentures. Visualize yourself enjoying those benefits feeling completely normal and comfortable (don't think about how you got to that point). Next, make a list of each of the specific things that disturb you about receiving them. Systematically desensitize yourself. See "freeing yourself from fear" at http://drmiller.Pinnaclecart.Com.
Ask for overdenture. A regular denture made to fit an upper jaw usually is stable on its own. However, you can receive an implant-supported denture in either the upper jaw. Ask your dentist if you are a good candidate for "All on 4" design. Good luck.
See Prosthodontist. See the Prosthodontist for evaluation and options. You might benefit from talking with some patients successfully wearing an upper denture. Also, you might consider fixed reconstruction on as few as 4 implants (all-on-4). Make the appointment -- you will be glad you did. Good Luck.
See a Prosthodontist. A prosthodontist is a specialist in denture therapy. 50 million people in this country wear removable appliances in their mouths, and often the anticipation is much worse than the real thing. A prosthodontist is specially trained to help you through the process.
It is difficult. Talk to other patients with dentures. Another option is to consider dental implant treatment.