i think i experienced both things that impaul99 and ALG mentioned. when i start meditating i almost always find something to scratch, and when i tried the exercise in the power of now wherein you try to feel the energy in your body i experienced the tingling sensations.
i don't know if i'm weird, but when i feel the tingling sensations moving around my body i find them somewhat ticklish find it hard to continue without moving my body a bit. i guess i'd just try impaul99's advice and not make a big deal out of it and just refocus.
thanks for the replies! i really appreciate it XD