I started vaping recently after quitting smoking a few months ago. During that time my nic tolerance must have disappeared because I'm getting nic headaches pretty quickly on the 12 mg/ml juice I bought. I have quite a bit of this juice and I don't want to waste any of it, and i don't want to have to wait between vapes because I enjoy it. How long do you think it'll take for me to gain tolerance to 12 mg/ml so I can vape it regularly?