Hi Jessica
It is possible that it is a technique issue. It is also possible that you have some strain in the muscles in your mid-back that are being aggravated with the entry to Hands to Feet and Standing Separate Leg Intense Stretch (straight back entries to get to the floor).
Here’s what I would like you to try next few classes: In both those poses, draw your hands down to your sides after regular set-up. Tuck your chin and then walk your hands down your legs starting at your thighs. Your back will round just as it does in Rabbit or Separate Leg Head to Knee. Then perform your pose in exactly the regular way.
Exit in the same way rounding back up chin up last. You may not need to use your hands on your legs for entry and exit but I suggest that you do it anyway.
If that doesn’t work we will move to the next level…
Namaste
Gabrielle 🙂