Could this be mastitis ?

Christina

I started feeling like I had a clogged duct around 11:45 this morning. I’ve been doing heat compress and massage, I tried dangle pumping, and have been nursing on that side as much as my baby will, in a bunch of different positions. The pain has gotten significantly worse as the day has gone on and around 5:30pm I stared having chills and body aches but no fever. Around 6pm I noticed a milk blister on my nipple and some red spots. I have had clogged ducts quite a few times but none that hurt this bad. Any insight greatly appreciated! Should I go to ER, wait till morning and call the de? Or give it a day or 2 to see if it resolves? Thanks ladies!