Might i have MS?????????????????

I Know it might sound stupid but i have anxiety about this right now. My Grandfather Had MS(Multiple Schlorosis)(However its spelled) and he died from it. But the thing is he didnt get MS until I think like years after my dad was born. So could it still be hereditary or not really. And for several months the right side of my leg has has a bruised feeling but its not bruised and sometimes if i rub that leg against something i feel like prickling feeling of such. not really prickling but like an odd sting feeling. Is that a sign or no? someone please give me information or personal experience. Im paranoid right now. O and i dont think its gotten worse over the past few months. i think its been the same