I'm looking for a bit of help and I'm not sure where to start, so I will just list out everything I am experiencing.

First I will say that I have experienced all these problems to some degree for quite a while, but they are occurring much more frequently, and it is prompting me to do something about it. I do not have health insurance until next month, so I am attempting to get some idea before I see my doctor (who I have not been to in over 4 years). I am a 27 year old male, not overweight at all. I sit at a desk during the day, but am otherwise very active (mountain biking, etc.)