Fantastic! Yep, just expressing and bf-ing, no matter how much you get, is exactly the way to go. 15 minutes is huge, I know, when it's hurting.
Sound like today was a win The wins take you through any regressions, they did for me. When it starts to get better, you will then have new benchmarks and painfree feeds become so much closer as a reality...until they actually are.
You deserve a happy dance!