Severe calf and inner thigh pain

I recently finished a spring semester at college and have had the last 3-4 offs which i have been mostly using to play video watch tv with the occasion hour long dog walk every couple days but mostly a lot of inactivity. I noticed a sharp pain at the bottom of my right calf and didn't think much of it, it only hurt when i used it and it was no worse than a sore muscle. I then took my dog for another hour long walk and afterwards i went for about a 5-6 mile bike ride and it was still bothering me but even the next day it didn't feel like the soreness was from the exercising but something else (this was all last friday). Then on Monday i went to a summer class on campus and had to walk all the way across campus and back and it felt rough especially because my class is on the third floor. Monday night the pain in my calf was about a 5 and it was hard to fall asleep. Tuesday morning it really hurt, it was incredibly stiff and i was limping around the house with a pain level of about 8 as i would cringe with each step. It felt like a severely sore calf muscle aching when i was at rest and burning when i walked but my other leg is completely fine no soreness whatsoever. I took 3 ibuproferins 3 different times yesterday for a total of 9 200mg pills and iced it 30 mins on then got in the shower and let hot water soak all over my leg because the muscle tension/pain spread through the back of my knee to my inner right thigh. I repeated this cold/hot treatment 4 times yesterday and it is still very tight and sore and unable to hold all my weight on it sufficiently i am having a very hard time just walking around my house. I have begun to take ibuproferins and do the cold/hot treatment again today but it is still very painful and hard to walk. I played sports from age 8 until 18 so I know what a normal sore muscle is like and and how to take care of it but this is beyond any i have dealt with before. The main thing i am worried about is the long period of inactivity before this very tense muscle feeling arose and because it is only in one leg i dont think it has as much to do with the exercising as some other cause.