Im a mess please help

im 16 years old im homeschooled and my best friend of 15 years died 6 months ago and im a total mess i stay up till 5-6am im alway tired no matter how much i sleep or how little i sleep i can concentrate on anything and im rarely hungry to top this all off my parents are divorced and between being home alone about 10-12 hours of the day i hear my dad talk crap about my mom whenever he is at home i do have a job thats the only time i see people

im thinking i will go to the doc soon tell him everything and then go to public school next year and finish my last year of school in public school to make sure im as smart as everyone else which im not dumb my IQ is above average i took an adult IQ test (should be over 18 to take this) and scored 124 a few points away from gifted do you think this is a good idea or do you think i should do something else if you do please let me know and please help im desperate and tired of feeling like worthless crap

P.S i spent most of my time on my PC

Talk to your Dr. about how you are feeling (if you can tell your parents, too). You have a lot to deal with right now and are struggling- you seem to be depressed. Your dr. may prescribe some medication to help combat some of the symptoms and recommend a therapist to talk to about your feelings/high stress. You should wait to make any decisions about school/future until you talk with someone and start getting some of your depression/stress/anxiety under control. When you are feeling better and thinking more clearly again, you can begin to make plans for your future. Then decide with someone what your options are and which options will best work for you.