Ms or more like anxiety?

Hello, im an 18yr old girl and the past 2/3 weeks have been abit of a nightmare.Iposted this before in the wrong section so i thought i better put it here.
I will start by saying i've always had anxiety and in the past it has stopped me from going to school or out etc. Anyway i''ll try to explain where this all began, about 1 month ago my nan had a digestive problem, one docter failed to recognise it and she had a rare complication,some operations and a long stay in hospital. Secondly my mum had a mild infection,went on atibiotics and got very ill because of them. All these health problems dont do my anxiety much good, so about 3 weeks ago i noticed my knee hurt when i hit it on something,then it was numb a tiny bit just below the kneecap and is sensitive to touch as im pulling on something, wonder if its probably abit of nerve damage since i only have pain when i lean down on it and not walking, im scared to go to the docter incase he says my legs needs to be cut off or its something serious even tho rationally i know knee injuries are common?

Well basically, the day i discovered my knee injury i had a massive panick attack, my first real one and i was terrified. My heart was beating so fast, i felt i was gonna be sick, i was dizzy and weak, needed to go to the tiolet and this lasted about 5/10 mins.
Then after my panic attack is when the problems began, that night my legs felt funny and my arms were heavy and achy. The next day i still had achy arms plus abit of tingling in legs/feet/arm/hand but only lasting a short amount of time, coming and going.My back and shoulders also felt tight along with the occasional twitch of muscles. I took some herbal calming stuff and it helped a little, my symptoms started to ease off. UNTIL i read about MS! i wish i hadn't, as soon as i read it my symptoms came back x 100 lol. Frightened me alot and was convinced i had it.
I have a friend who studies medical things and she said its extremely unlikely since all my symptoms only came on after the panic attack, and get worse when im reading or thinking about it. they usually go away in the daytime and come back in the evening when im bored or start obsessing over things. I havent had them every single day though.i think im close to becoming a hypochondriac soon because ive been on sooo many health websites and these famous deaths lately haven't helped either. Ok sorry about the long post, to sum up everything i've had in the past few weeks, on and off, fairlyl mildly, occasional tingling/weakness/muscle twitches/abit of aching/feeling restless uneasy and just weird in general at times,being tense and back or shoulder pain, one or 2 headaches.

Im freaking out incase its something horrible, gonna try to go to the docter next week about my knee and see if that helps a little to ease my mind?? cause it seems thats what im stressing over alot.But then i've round about some people with my symptoms who have had it for years and dont know what it is, so that wont help atall!
Could my aching and other strange things have really come on through my anxiety? I thought i was coping well mentally with bad stuff that happened but its like it came out physically instead, which i hadn't experienced before.
:(

[Gem91]

Oh and last night my leg ached where my knee hurts so of course i thought whatever ive got has spread and now my whole legs infected, even though ive woken up now and its fine, anxiety is driving me crazy!