Make the appointment tomorrow morning! The people here not advocating seeking professional help, are the same people who have never received help. Trust me, seeing a psychologist is the single best thing you can do. If you had a physical illness, this type of question would not even be asked, mental health problems are just as serious and should be treated that way.
Also if it doesn't work out with the first psychologist, don't get discouraged. Just make another appointment, and find one that fits your style. Dude, lots of people have been in your position, but the ones that are happy today are the ones who treated it as seriously as they treat all other aspects of their health.
Good luck,
Edit: as much as it is good to talk about this with friends and family, they really don't have the tools to help you overcome this. People think you just need to cheer up, or pat you on the back. Happiness is journey, for some its easy and for some it takes time and effort.