Help getting better, feel the worst

On tuesday I was feeling well so I went for some labwork order by my primary and to pick up my B12 injections, like 1/2 hr form where I live; then on wednesday I was feeling regular, like I hadn't slept and foggy, I did some things but took it easy, yesterday I was feeling better not good, but I needed to do things and food from coscto, which is heavy to bring to my apt; later I was really stressed about something and went to bed. I woke up 2 hrs later feeling horrible, took 2 hrs to sleep again and today I feel horrible, I think it might be a virus, and yesterday someone that looked sick handed me a scizor and even I used purell afterwards I dont know if I got something from her. I feel horrible, everything hurts, no stamina, foggy, to move I have to think about it...Please give tips to get over this. I am taking alka seltzer gold and if I am able to later, take an epson salt bath, but now I can't, what else should I do? Thanks for any advice,