It's by no means a great feeling, but I think it's relatively "normal" (as far as anything can be). I go through periods of really struggling during a break, to periods of being fine with it. I think it has a lot to do with outside circumstances (if I am not feeling so vulnerable, if I have enough non-therapy supports, the breaks don't feel bad. If I am struggling with something or have no one outside fo therapy to look to for support, then the breaks feel unbearable).
It's definitely somethign to talk to your T about so that maybe you can get some more supports in place. It also makes complete sense for you to feel liek that since you said something big happened right before the break...