infected belly piercing?

so I got mine pierced 3 weeks ago and it was healing completely fine. the past couple of days its been more red than usual and i’m not sure what i could be doing wrong? (could it be because of sweat from going to the gym?) i use Dial antibacterial soap in the shower and also sea salt soaks with a shot glass. I contacted my piecer and she said to stop using the soap and to just rinse it twice a day in the shower (just water). i want to trust her because she’s a certified APP member but I’ve never heard of anyone cleaning their belly piercing with JUST water. advice? is mine infected?