let's see now, does it hurt when you turn your head and cough? How about when you run around the block? do you find that you suffer from shortness of breath?
Seriously though, all joking aside, When one first stops smoking and starts vaping, gumming, patching, doing cold turkey, things happen. As your body detoxifies from all the chemicals that are contained in cigarettes, it is not unusual to experience discomfort, head aches, some sweating out of the toxins, causing unusual odder, minor aches and pains..... So what you are going through could be just normal.
Also, if you are vaping a lot, and are using 24mg or higher nicotine juices, you could be over nic'ing your self, and be experiencing nic hangovers. Vaping a lot can also dehydrate you, also causing head aches. Plus, vaping devises can deliver nicotine more efficiently than smokes. The better the devise and delivery atomizer, the better the nicotine is absorbed into the body.
Also, what PG/VG % are you using? Some find they have an allergic reaction to PG or to high of a PG %.
Or, if you drink, you could be just hung over. Sorry, just can't help my self.
Though It could be something entirely non vape related. Schools are back in session, kids passing around the latest cold, flu, virus., something you ate.lll
Take 2 aspirin, drink lots of water, take lots of vitamins, eat healthy, lower your PG and nic level, then call me in the morning and I'll tell you what to do. Put them lime in the coconut and drink in all up...put the lime in the coconut, it make you feel better. ..