It's okay
Topics can be returned to as often as we want to and topics are often returned to for this reason. Uncomfortable topics are difficult and scary to talk about so of course we try to wrap it up quickly or suddenly when it becomes too uncomfortable. One way through this is to stop when it is beginning to feel too uncomfortable and say to T "I want to continue but I'm feeling really uncomfortable right now." This is very important information for T and you and it will be useful for T to help you at that moment.