Parter not going to dr appointments?

P
I need to vent here and see if I'm overreacting and upset over nothing
My boyfriend is very supportive and is very excited about our baby boy. We talk about it a lot and we are nesting and it's great. 
Yet he doesn't seem to care to come to any of the Drs appointments and ultra sounds. He makes me give him all the dates of my appointments so he can get the day off and then he always ends up being booked to work and not making it. The only appointment he came too is the 8 week one- he hasn't made it to the 12 week dr appointment or nuechal screaming ultrasound or the 16 week dr appointment or scan. They could see the sex at 16 weeks but I had to have them write is down and not tell me since he wasn't there
I had told him that the 20 week anatomy scan this Wednesday was super important - I have him the date months ago and I keep reminding him to take the day off to go with me and he said he asked but they never got back to him - So he didn't even really try.
I know he is stressed about money and wants to work as much as he can- I think he also feels inadequate since I work much more than he does and make more money. 
It hurts my feelings that he doesn't even seem to care about going with me. When I show him the ultra sound photos he is like oh whatever - I just feel like if he saw him moving around and stuff he would feel more connected . I'm just disappointed and honestly scared to go to the anatomey scan alone 
Do any of your SO not come to any appointments ?