Over the past few weeks I've noticed that after I smoke, I get very, very tired. I don't even have to smoke a lot, a few hits will make me really fatigued and lethargic, and it's happened with a variety of different strains. Sometimes I feel so exhausted afterwards that I'll feel a bit dizzy when I'm walking, but nothing major. Has this ever happened to anyone else or does anyone know of ways to counter it?