You are being overly paranoid. :)
While in theory, it is possible to transmit it yourself, it's not all that likely to happen. Your doctor is right (and doctors who know about herpes are rare, so keep him). After you develop antibodies - this can take up to 4 months, but usually happens faster - you won't be able to do this except in extreme circumstances. Just don't touch outbreaks and then immediately touch your vaginal area.
IF by chance you did get ghsv1, it rarely sheds, most people don't get a lot of outbreaks, and in the absence of having sexual activity with symptoms, they rarely transmit it. Many people with ghsv1 don't take suppressive therapy because the chances of transmitting are so low and the frequency of outbreaks is so low (some only get one ob and then never get another).
If you need extra lubrication during masturbation or sex, get some good lube. If you use condoms, make sure it's water based. For masturbation, you can play around with different types - silicone, water-based, etc. Some women get yeast infections from lubes with sugar, so pay attention to that. (I mean, not for nothing, but this is also fun, and after all this, sexy fun is a good thing, right?) Here's a good article on it, but omg it is so not safe for work, reading when you are near other people (like your mom or kids), etc - https://www.buzzfeed.com/carolinekee/slip-n-slide-into-the-bedroom?utm_term=.ir59eGGB3#.cn0nOYY7x
Remember that you are not a walking infection or contagion. You have something that at least half of the population does. Don't buy into the stigma of it all. You are better than that. :)