I just wanted to come back and update everyone who was so helpful with their tips!!

To be honest, I got so frustrated, I just kind of walked away from all of this for a while - then went to go back, and one of my batteries was a goner (the clearo was still on and I think some of it leaked - regardless, it was dead, wouldn't charge). So, I started from scratch - 2 new Ego-T's, some new juice at 50pg/50vg, a slightly higher nic level (as a pack and half a day smoker, I had only started with juice that was 12 mg's and 8 mg's - way too low).
So, in the end, I definitely think it was the pg that was making me cough - Sunday I put some of HHV's Peppermint Blast (50/50, 15 mg's) into my clearo and it was like the holy grail - haven't picked up an analog in over 52 hours!

And more importantly, haven't coughed once.
So, for anyone new and struggling that might read this - you
will get to where you want to be, it just takes time and some trial & error. Be prepared to be surprised about what flavors you might like - I was completely convinced I'd be the sweet/desserty type - yet it's anything peppermint that has turned out to be my absolute favorite! The TH & flavor from this peppermint blast has left me not craving or missing analog's at all. (after 18 years of smoking - that's just crazy!)

Be prepared to experiment a lot - pg/vg/nic level/flavor etc.! - once it all comes together, it is so worth it!