Yes, that can happen, I am not sure "why" a trauma can not only develop into PTSD, but bring back other things that had never been a problem before. I think it has to do with the post traumatic stress breakdown that attaches to anything else in our personal history that was stressful. There typically is a theme of not being heard or an intrusion of boundaries or being stressed and not knowing how to get away from the stress, even being alone with no help during the stress in a history too.