weaning help

I was pumping for 4 months & on October 31 I decided to start weaning. I started by extending my in between pump time then cut back on the duration. I ended up with mastitis. Now a week or so later, after stopping pumping all together, I think i have mastitis again. I thought I was supposed to stop pumping so it wouldn’t increase but I’m pretty sure I’m doing this wrong. Any suggestions would help? I’ve tried the cabbage leaves and tea. Does Sudafed help? I pumped this morning and got 4 oz total which is lower than what I used to pump. I used to pump about 6 oz every 4 hrs.