Replying to Semi-high for 36 hours

So... Saturday at about 12 at night or Sunday morning 12 o'clock whatever fuck you, I smoked for the first time at my friends party (weed). Then I woke up Sunday prepared to not be light headed/ dizzy/ confused, and I was wrong cause I still feel that way and it's Monday. Now I know there is a possibility I am just over thinking it and nothing is happening but I imagine that this has happened to some of you before so... Halp.