insane head pressure and tingling ?

ok, iam getting insane head pressure and headaches along with tingling in the right side of my head, and tingling in the ears with most of it in the right ear , after having a big meal , bascially after eating a lot, and along with that i get sleepy also and also dry mouth sometimes. this happens from time to time, last time this happend was 2 weeks ago ? its like i get high'ish after eating a lot of food.

anyone knows y this is happening ?

thanks