Not wanting to eat?

My babe just turned 3 months old and for the past few days she has been sooooo resistant to nursing. We EBF but she’s only been eating for about 5 minutes every two hours and she fights me before finally latching on. She’s recoiling away from my boobs and arching her back a lot so that makes me think it may be reflux, but I haven’t changed my diet at all and she’s just now beginning to act like this. Any advice?