FEAR! HELP!

I have been presented with an amazing opportunity! I could very go on a vacation with my husband for my 30 birthday (not this coming January but the next one), FREE round trip flight and hotel!!! IN JAMAICA!!! Problem: I've never been on a plane, and the thought of getting on a plane sends me into a panic. Seeing a plane fly over head makes me sick to my stomach! I had a complete meltdown panic attack when I got to the front of the line for a roller coaster. How could I ever get on a plane? If anyone know how to overcome a serious fear of something PLEASE HELP!!!!!