Stress / Anxiety :: Paranoid And Frustrated With Movement Issues

I am 17 years old, I think it's some anxiety because I get really paranoid and frustrated a lot, especially at when it comes to my boyfriend (I seem to always have something to be mad at him for and he's really not a bad guy). I get angry all the time and convince myself that I have nobody there for me and no friends, so when one bad thing happens in my life, it seems everything comes out at once and makes me even more upset than I should be, and I end up looking crazy for getting so upset at something so small; when people don't know it's a lot more coming out all at once. My mom won't believe that anything is wrong with me, I tell her I think I have anxiety problems and she's just a typical parent in denial: "You don't have that, you're too young, you don't need to be put on meds.." and so on. It takes me an extra hour to hour and a half from when I lay down to actually fall asleep, and when I wake up in the mornings for school, I feel really heavy and don't want to move; which is typical early in the morning, but it seems to be feeling heavier and heavier as the week goes by. I always feel hungry, but as soon as I open my mouth to take a bite, the hunger turns into nausea and I can't eat. I have to force as much down as possible and I end up not being able to finish a kids meal at restaurants. My bones are always aching and I feel like I have to always crack every part of my body: my neck, my back (which by the way, my lower back has crazy pain which makes it uncomfortable when I'm trying to sleep), my knuckles, my toes, and my elbows are feeling the need to be cracked even after I crack them. My muscles always feel tight, I feel like every muscle had stiffened and turned into a knot that won't go away.. My muscles also feel weaker. I do football cheer leading and before a game about 3 weeks ago, I did a split to stretch my hamstrings and when I leaned down into it, a muscle in my lower butt check/upper thigh popped and felt like I tore it... I didn't but to this day, I can't lift my leg all the way anymore and it hurts when I sit for too long. I don't think I'm pregnant, every time I take a test it's negative, and I'm on birth control, and don't have sex that often anyways. My period comes when it's supposed to, but it's crazy light, it's almost like its not there. This past June, I had to go to urgent care to get an IV because I didn't have enough fluids in my body, so my body starting denying water. During that, I didn't have any of these painful symptoms, except I did experience the hunger without eating a few times. Most days I have to get high to force myself to fall asleep at night or to eat something so I don't starve or loss more weight (I've lost about 20 pounds now) but it seems that getting high isn't working that well anymore. My body is really sensitive, I bruise easily and it takes so much longer to heal than it used to. I've researched this on google and it seems that a lot of women have these symptoms, some don't know what it is, but most have been tested for different things and gone to the doctor.... my mom won't take me. Can someone please help? Tell me what could be wrong? What I can do to fix it? If you need more info or anything let me know