Okay, im no doctor and neither are any of us, (unless I missed some one ). First of all Id say GO TO THE DOCTOR. If you have never suffered from heavy nose bleeds like that, it could be a symptom of many circulatory problems, coronary or symptoms of a stroke. Now that I ve scared you, here is another fact. Nicotine is a vaso-constrictor , meaning it constricts the veins and capillaries in our bodies, and that the blood has to work harder to get around from heart to all the parts of your body and especially your brain.
I dont remember exactly how much you smoked before and I dont think you mentioned the percentage of your nic in the juice you are using. Maybe you are getting to high of a nic dosage, Did you feel at all dizzy or get a buzz? Slow down, drink more water, suck on a mint or hard candy. You said you blood pressure was normal? did you actually test it with a reliable monitor?
If you recently quit smoking cigarettes and you mentioned you are on the slightly older side of the average lifetime, your body is going thru a lot of chemical and physiological changes. I think the subject has gone from a nose bleed and possibly something you are vaping to a discussion of high fructose vs sweeteners and aspartame etc. Drink some water.
PG is drying, and being what gives you the throat hit, it does to a point aggravate something in the mucous membranes, hence the nasal problems.
See your doctor, please, not to freak you out, but at our age, this is nothing to sneeze at so to speak.
I was reading this and jumped to another topic, but I could not resist giving my thoughts and to turn my back and ignore some health warnings would keep me up all night worrying about you.