Should i go to the doctor?

So I'm about seventeen years old. My mother is diagnosed with anxiety and bipolar depression. & I'm kind of afraid that in some way i inherited it. I have 3 other siblings. My mother has used alcohol in the past but she has been clean. My siblings all have used drugs. My sister is an alcoholic. And both of my brother's were on heroin. I think my brother had anxiety before but I'm not sure. But anyways, i always felt like something was off with me but i always told myself i was normal. People always call me that shy girl. Im always uncomfortable if im around people i don't know. I feel as if i can't be myself. Lately I've been going out in public and i will get like a hot feeling. I feel as if people are watching me. And when i talk to strangers i get tense. I've always been afraid to go to the doctor and get diagnosed. I think i might have social anxiety but I'm not sure.