Headaches, Leg Numbness, Losing Balance, Sleepy. History Of Head Injury

hi i been getting bad headaches for two week now it start one day and and had it all day i went bed but when i woke up i had a dent in the front my head where i had head injury a year ago and had a really bad headach all day yersterday and went bed last i woke in the morning and there was biger dent this morning but igiorned it went out to firework deplay then when i was out i had really bad pain my head and then i felt like balce went and felt falt then i felt really strange and y legs went dead and felt like i could nt lift my legs and don t whats happening to me i still really weired i feel very sleepy