Hi. I have been vaping for two months. Haven't smoked tobacco since I started. I have a problem. when I wake up in the morning I have sharp pain in my tongue. Similar to tongue bite experienced by pipe smokers. Is this caused by vaping? I am using 24mg 70pg/30vg Ejuice, mainly fruit flavours. Has any one else had this problem? Or do I have issues that are not related to vaping?