Don't worry yourself over it. You've gotten good advice already. I wouldn't give you a period of time that you're "over the hump", though, because it's different for everyone.
Some members here have been vaping and smoking for YEARS--maybe just that first smoke of the day, maybe just before bed. Remember that it took years to develop the smoking habit, and it may take nearly as long to break it. As long as you're making progress you're doing alright.
For me, within 24 hours of getting my PV, I vaped exclusively for 3 weeks with no lingering urges to smoke (well, maybe once but when I had a couple of drags of the real thing it was nasty). I thought I was over the hump. Then I came up against SERIOUS stress, and that's when my "winning" streak ended for a week. I smoked and vaped about equally for that week, discovered that nic and a decent set-up was NOT enough for me, and found an alternative that is helping keep me off the analogs.
I'm now back to vaping exclusively for a week--I hope for good this time. But it may not be. The great thing about it is that I KNOW that vaping is a viable/better alternative and I will
always go back to it after I slip.
There is a really good thread here that you might be interested in:
http://www.e-cigarette-forum.com/fo...dicted-smoking-habit-support-chat-thread.html
It would be nice for me to be able to say I'm 6 weeks smoke free, but that just isn't realistic for everyone. We do what we can, we have a great support group with ECF and our families (hopefully), and I think that's a great foundation for ultimate success.
Good Luck to you!