What Causes A Painful Lump On The Leg Along With Crawling Sensation?

I was just wondering if you could help me figure this out.... I woke up four days ago with a pimple looking thing on the back of my leg causing me problem to walk because I can t put pressure o. The next morning when I woke up I noticed that it had almost tripled by size in length and width there was so much pain to them that I couldnt stand because if I tried to it felt like poison was running through my leg. The next day I decided to go to the hospital and the only thing they did was techna shot and send me home less then 5in there..... now earlier today I woke up because It felt like I had something crawling on my legs I looked all over them and all over the blankets nothing was there but I found that I had been bitn two more times N just as I looked at one of the new bites I seen 5 baby something come crawling out of it and then my wife squeezed it and 3 more baby s came out and 2 huge eggs.... I went to the local hospital for it and they plain out told me I was dumb so I hope you can help me Thank you Korttney