So, lately whenever I vape my heart rate raises a bit. And i'm starting to get real itchy on my hands and such. I don't see this being a PG issue, since these are just now developing symptoms and i've always vaped on 50/50 blends. And I know it can't be a silica allergy because i've used silica so much before now. I don't even chain vape, or vape a lot for that matter, maybe once every 10-15 minutes. I'm using 12mg nic, just moving down from 18 and will be going to 0 in a few days. Just want to assess what could be going on here.