ill constantly help PLEASE IM BEGGING YOU

hi someone please help im 17 years old and im constanly sick and tired i have ibs and also depresssion .i ave gone to my doctors but she has just said its anxiety i really dont think so i always feel sick my stomach is always bloated i get severe chest and heart pains and it feels really tight i get very very dizzy especially if i move about i feel mor sick and faint ,i eat well but i am underweight.im always in pain i get stabbing pains around my body im constantly tired especially after eating my mouth tastes funny i always need to go wee but it hurts wen i do i always need to go i cant even hold in a liitle bit as it hurts if i do .i have had blood tests and a urine test.i also feel very weird when i move and my eyes go blurry sometimes i feel so weak i think i cant move.somebody please please help me i cant put up wit this any longer and my mam is sick of bringing me to the doctors HELP :'(