Hubby keeps having me reschedule u/s!HELP!

Question! ! We are paying for an elective ultrasound to find out gender at 16 weeks but i make an appointne and my hubby has me reschedule, twice now, its because he is a painter and the job keeps getting extended. Ans he just asked me to reschedule for a 3rd time. I am getting pissed, honestly. Slightly immbarrased that the u/s place keeps having to reschedule for me.its rude i think.

My question is should i just go to the apt without him? Im really considering it. Or should i just reschedule again so he can see his baby?

He keeps telling me to just go and its ok... but idk if hes just trying to be nice. Lol help?