Baby doesn’t want to nurse after milk came in

I’m a FTM. My babe is 4 days old and breast fed like a champ UNTIL my milk came in yesterday. He wants no part in sucking.

Last night, I tried pumping some in case my nipples were too big, I put a warm towel on my breast to drop my milk and I finally pumped and bottle fed him after hours and hours of trying. He drank that fine!

Please tell me someone else has experienced this! So stressful