A lot of mental illnesses are somewhat related but they express themselves with differing symptoms. They all seem to be fear based but the fears are of different things. Medicine classifies these differently because they have different results. The different expressions of different fears could be genetic. It sounds to me like you are under a lot of pressure but also that some fears have surfaced. Ancient wisdom says, "do not fear, do not anxiously look about you..." It might seem trite to you for me to say not to worry so much but it is good advice. Things will still work out even if you don't achieve all of your goals. You can still be happy and you can still be at peace which also should be your primary objective, like Dave on this site says, "every day is special". Enjoy the moment.