Sorry you are experiencing a disconnected feeling. I think it is a pretty normal occurrence. It still feels crummy, though! Have you communicated this feeling to your Therapist yet?
Try to keep in mind it is temporary and the connection will be back.

Could it be you really are beginning to internalize those good feelings and it scares you because that means the connection is not as strong between you and your Therapist when you are together? For instance, you could be feeling these great things every day and when it comes time for your session the feeling is "nothing new". I can see how that could cause disconnect.