How to get rid of a milk blister??

Shelby • Teacher, wife, and mama to Jaide and Knox!
I have my first milk blister...OW! How do I get rid of it? I googled it and it said to soak it in warm water and rub a warm wash cloth on it to try to get it to open, then either nurse or express milk. I popped it (probably a terrible idea) and tried to get milk to come out. It hurts so bad! I'm terrified to nurse or pump. What can I do to get rid of it?! Thanks!