belly button ring infected?

Jasmine

I got my belly button ring pierced about 6 years ago. no problems. I am 22 weeks pregnant and put in a maternity ring last week. all of a sudden, the inside of the piercing feels like fire when I move the ring up or down. I've tried saltwater but it still hurts really bad. the ring is supposed to be ptfe plastic. anyone else experience this? what did you do? I don't want to take it out if I can help it but it is getting pretty painful.