Yes it is possible. I was diagnosed PTSD for two years before I felt safe enough to remember. You don't have to be in any hurry to prove or disprove this diagnosis, just go slow and be sure you feel good about the T you mainly talk with and things will happen when the time is right. If you have a anxiety disorder of some other kind it will become apparent in time too. The symptoms for PTSD are fairly clear so don't be surprised if even a sliding scale clinic gets it right. Loss or protected memories are common. It's your minds way of keeping you safe and productive when things are not safe. Take care. Stay safe.