What Causes Bruising And Swelling In Leg After Stepping On A Nail?

I am a 37 year old female I ve never had any of problems with leg swelling not even remotely. I ve been dealing with let s just say chronic stress and have never had any thing like this happen before not even remotely. I stepped on a nail it went about 1/4 into my foot (new,no rust) that was about a week ago. not sure if has anything to do with rest of this. I had a rubberband around the leg of my sweatpants holding it up, pant leg kept getting lower so I pushed it further up my leg after several hrs. I removed my sweats there was a blackish bruise looking thing in back of my calf .say just below where rubberband was Next day The other night during super stressfull emotional situation all of a sudden my feet felt like they were perhaps been asleep, now waking up; tingly . I looked down and my ankles looked little swollen took my shoes, socks off feet little swollen. Within half hr. 40 min. I watched as my ankles, then calves quickly got really swollen my whole legs were tight. then both mostly left arm losing feeling from pinky sides of hands, muscles tigthening. I took some deep breathes noticed little hard , my chest then started to tighten kept tightening . my head also felt funny .I was not panicing I was going to go to hospital but conversated with family member for an 1 to 1.5 hrs was wore out so just laid down on floor with legs raised for little while then skept on floor couple hrs to wake with my eyes swollen huge