I thought I was dying, or something serious anyway

So, i was picking up the kids from school and i noticed i had trouble staying in my own lane. I thought that was odd. Then when I dropped off the other kid that I take home (carpool) I felt like I was about to faint. i barely made it into my friends house and collapsed on her floor. I was sweaty and pale and my hands and feet were numb and purple. She called my mom to take me to the hospital and my friend watched the kids until Will could come home and get them. The doctor at urgent care thinks it was a bad reaction to medicine my regular doctor gave me yesterday for my sore throat, sinus infection. He sent me to the ER for blood tests. I am feeling a lot better (aside from the sinus infection) but man I thought I was dying! So weird!