What workouts should I avoid until my core is stronger?

Movements that strain the abdominals - think boat poses, straight leg lifts (single or double), Pilates 100s, pull-ups and crunches. 

Movements that twist or pivot the body at the hips - think back and crawl when swimming (avoid the butterfly - too much sudden exertion to contain pressure) or where the abdominal wall has to work unsupported against gravity.  

Anything high impact that exerts downward pressure through the pelvic floor - think running and bouncing.

Remember with ALL exercise, the same guidance applies as set out here.  You need to keep monitoring your body and asses how it's functioning and if it's telling you it's not ready - listen! 

So if you ever leak, feel any bearing down, heaviness or discomfort in your pelvis or pelvic floor when you run, bounce, burpee or crunch, that's a very clear signal your body is not ready for that. 

Leaking when you run is NOT ok. If you have any level of pelvic organ prolapse, you definitely should not be running. 

If you’re stable, strong, supported and functional when doing these types of movements, they're probably ok.  But if you're feel weakness, pain or leaking, this is your body telling you in no uncertain terms that it's not ready for what your asking it to do right now.  You need to heal, restore and strengthen first.