Severe Ankle Pain with Toe Numbness?

Okay. I went to bed last night with some moderate pain in my ankle and calf. It wasn't too bad I was able to tolerate it. I woke up this morning with such severe pain in my ankle that I can't walk on it. It hurts to move it, my toes are semi-numb and the vein on the outside of my foot is bulging out. It seems to be slightly swollen but there isn't very much swelling. I did not injure it in any way. Anyone have any idea what is going on? Thank you so much in advance. I have no insurance so if you know a home remedy to fix this I would greatly appreciate it as well. :)