Need clogged duct help!!

I have been exclusively pumping for less than 24 hours now as I am out of town and away from baby. I already have a large warm red mass on one of my breasts. No amount of warmth, massage, or pumping seems to be draining it. I can even feel the little lumpy ducts underneath!! It is mildly painful, not too bad, but I don’t want it to get worse. I normally pump a couple times at home in addition to breastfeeding, so pumping is not new to me, but this bad of a blockage is!

What else can I do to help it?? I don’t go back to baby for another few days. 😔