E Cigarette, Not Enough Nicotine Or Too Much? Pulse At 55 Beats Per Minute, 158/92 Blood Pressure?

I’ finally put down regular cigarettes back in mid July, I have Smoked nearly 13 years, About a Pack a day, ( Sometimes more ), Other times alittle less. Also for the Last year, I have been drinking pretty heavily, was consuming about 8 or 9 beers a night probably 5 nights a week. Also, due to Sinus Problems, I use OTC Nasal Spray regularly. I have a dieveated septum from breaking my nose in college,,, about 5 or 6 years ago. First I tried to quit using Nicorette gum, failed, the patch, failed. Then a Buddy of mine told me about a Electronic Cigarette. Which produces nicotine / vapor, you load a cartridge into it, and you puff on it and it creates smoke like a normal cigarette, but without any chemicals, it’s just Vegetable Glycerin and Nicotine with Flavor, So it’s like smoking nicorette gum. LOL, Anways, everything was fine with the E cig for the first few weeks, but starting about 3 weeks ago I have been feeling really crappy, Low energy, Extremely stuffy sinus’es, pressure behind my face, around my eyes, feeling very fatigued , when I stand up to quickly I seem to get dizzy, never fainted or anything, But I stand and my ears start ringing, and i feel lightheaded for about 30 seconds. I got laid off from my Job this summer, so I’m very broke and i dont have the option of seeing a doctor or the ER, My mom’s a nurse and got me some antibiotics , she thinks its a sinus infection, so I went to the Pharmacy today and my blood pressure was 158/93, and the pharmacist felt my pulse and counted it for a minute, which was about 58 beats per min he said. I told him my symptoms, and he said it could be because I’m not getting enough nicotine from my E cig, and said he heard that alot of E cigs dont deliver as much nicotine as they advertise, he suggested I up my dose, because he said if i was getting to much, my pulse would be higher, in the 70 to 80 beats per minute, which is what is was at before I quit smoking regular cigs. Is my body going threw nicotine withdrawl? I have been using the anti biotics for about 2 weeks and had little to no improvement. Pls help me out here! Thanks!
PS, Also I brought a Benzedrex Nashal Decongestant Inhaler, because I was using too much Nasal SPRAY, and it works really well, after i use it, My ears pop like crazy. I works really well, but the effects begin to wear off after about an hour.. Thanks!