What Causes Palpitations And Heaviness In Head After Taking Mefenamic And Indocin?

Hello I took a single dose of 25mg of mefenamic acid yesterday noon and same dose of indocid an hour after for menstrual pain when it wasnt going down.now suffering from head heaviness and tingling and a weird stoned feeling this dawn.this is d 2nd return in 10 hours without the former wooziness and weakness and rapid heartrate.im disturbed