I use a Joye 510 with Liberty liquid (11mg) I noticed that after vaping I get a sleight, very mild headache and I feel slightly tired, why is this? I just started vaping (3 days) I quit smoking 3 days ago and haven't had a cigarette since (I used to smoke 7 cigs/day.) Anyways, why is this happening? Is it normal? I only vape as much as like I would as a real cigarette (100s)