Any tips? I try to pump to relieve pressure, only 3 minutes of pumping and I get out 3 ounces. 30 minutes later I feel overfilled all over again. it's only day 3 and I have a massive oversupply again (I had this with my first as well)

I'm in a lot of pain, any movement causes a let down. My boobs, according to my step daughter, look like they're ready to explode at any minute.

Please help, I don't want reoccurring mastitis like with my first