I Had A Ticket Cough Yesterday That Hurt My Chest

I had a ticket cough yesterday that hurt my chest when I coughed so I assumed I had a chest infection coming. I have come home sick today as it has got worse and suddenly out of nowhere both my legs are really stiff and aching it hurt so much to walk so I had to go home. If anything the aching has got worse. Plus I feel a little dizzy but that is probably from the cough medicine any ideas?