I'm having similar experiences recently. I cried all the time with my ex therapist, whom I stopped seeing in September. I haven't had a proper cry in therapy since. My current therapist supposes it's a defense mechanism that I've developed in light of the traumatic experiences I had with exT. From your post I'm wondering if the intellectual part of you takes over (now that you're recognizing your emotions). That's only a hypothesis, and I'm definitely no expert.

I have hope it will get better, because you're right. It is very unpleasant to have the feelings that would typically bring you to tears but can't cry.