I am worried I have MS.

So to give you a quick introduction I am a 19-year-old female and I have been struggling with anxiety for about 4 years now. I have has fears about being gay, having random diseases, and dying. Right now though I am 100% convinced I have MS. About 3 months ago now half of my face started to feel kinda funny, naturally i flipped out about it. My face still feels this way and im still flipping out. One of my eyes feels kinda sore, my feet, hands, and arms soemtimes tingle or feel weak. I am nausous, the left eyes vision is worse, I am so tired I cannot function. Im just so done with this BS. Any help or advice would be great. I have seen a doctor and she said that I am overreacting but what if I am not and shes underreacting and I end up in severe pain for the rest of my life. I want to be like everyone else my age, not confined to a wheelchiair or unable to function. ): i have so many things I want to do in life. But im giving up