R.J.
This is what my brain does:
I have a number of HUGE, BIG, SERIOUS things going on... so it focuses on something that's not even in the ball park of 'no biggie' to freak out about. It's how I cope. When I DON'T have something inconsequential to freak about, I create one (Like deciding to redo my kitchen mid-divorce. Um. Yeah. Not smart), or what I'm going to wear to a funeral, or, or, or, or.
You're grieving over a lost relationship... but your brain is, instead, grieving over a lost child you don't have yet. It's "easier" than dealing with realtiy, and is pretty classic PTSD coping skills right there.
Which means... Counseling & Education.
Or continuing to freak out about improbable what if's, instead of dealing with what's going on in your life.