Ya, u sound alot like me in many ways, except in a 24 year old male, single, live alone.
Unfortunatly the tests r not a medical diagnosis, and if u r serious about getting the DX for whatever reason, u gotta caugh up the $$ to get the DX from a qualified specilist, which sounds like thats your problem, u want to know for sure, thats why u obsess about it.
U should look at your options, i bet once u get your DX itll put your mind at ease at least for that subject, their will always be new ones.
Im currently obsessing myself, i started being obsessed with my yearbook collection, after years of not being in school i got them all out, tour the house apart to find them, but i dont have my 2nd grade yearbook from 1990, and its killing me inside, after 17 years, it should net effect me this way, but i know ill never have a complete collection, its almost like that year i did not exist, its a horrible pain, ive been thinking about it alot and dont know what too do about it, this is not normal, ive tryed to remember everthing about that year, for some reason, much of what pops up is my memories of the gulf war watching it on tv, and my second grade classroom. I feel lost, i know the more i obsess the worse ill get, i cant let it go, maby this is how u feel about wanting a DX, but not being able to aford it, it will kill u inside...
sorry for my ramble, ive never felt this way b4...
i wish ya luck, try looking at your options if u have to get a DX, at least u can acheive this.