This post is such a concidence! I just now was in a meditative state and started to feel the vibrations of ap for the first time ever! Though as soon as I started to become aware of what was happening it stopped and I kind of came back into awareness.. Thanks also for the advice!
Also before the vibrations started I felt one of my fingers start to raise up (like someone was lifting it) and I felt like my lips were sliding to the side of my face, is this normal???