Hello Blueberry, can we offer you a warm welcome.
The answer to your question is that this largely depends on how strong the person has become, people are able to overcome PTSD if they have had good counselling, to begin with, but then stopped, then been able to address the problem in your own way, either by changing their routine or eliminating the trigger points that once sparked a reaction.
If your doctor believes you can do this, then reducing your medication over a period of time, then you won't need to take the medication, but if a relapse happens then you might need to see your doctor again.
This might not suddenly happen the first or second time but yes it's possible and talking with others who have been through what you are experiencing may seem like just a conversation rather than counselling, this just depends on how you view it.
Please let us know how you feel.
Geoff.
