Gymnasium Side-Effects..

I just joined the Gym 2 days back.The major reason  being my 'Potbelly' developed in recent couple of months.I don't know how i really got it but one thing i can remember is increase in my appetite.Anyways so i joined the gym as i heard from many friends its goodand helps to stay fit,which i feel is true enough.Also i heard that it takes  a while to adjust and it body is sore the few days but i thought how bad it could get anyways!!.So the first day i did whatever trainer told me too in fact in excitement a little more.That day didnt feel any noticeble pain but the next day i woke up my hand were sore and legs were aching too but the pain was pretty bearable.In the gym again i did do the warmup but the weight were really difficule to do i remember not able to even 1 pushup properly.Also i did fell down on my already sore hand from the treadmill and the reason for fall is really pathetic to mention here.So after going home my hand were really sore  and  any bending really caused excruciating pain.I could not sleep for couple of hours in the night.To my horror the pain actually has worsened today and i cant even bend my hand to touch my face or hair or evn to eat which i do often.So i have brought some painkillers and hope that  they can relieve the pain.I know this is silly post but didnt know how to get this blog goin so just started with my recent painful experience.. and at the same time i am still of the opinion that everyone  not fit enough or obese should still join the gym.
Do convey your feelings on the topic ..
signing off ..