Fiancé Trouble

My fiancé and I have been engaged since September.

He has 2 kids with his ex who he is currently in court with to get child support lowered

His youngest is having surgery in the morning to correct his tongue tie issue and he called and told me what time he needed to be there. I obviously asked him if he asked questions such as how long they expect the procedure to last and recovery time. Instead of just telling me that they called his ex to confirm the appointment time he just said he didn’t think about asking the questions.

I have gone above and beyond and all I ask in return when I’m doing things such as offering to help take care of his daughter while they are at the hospital with his son is to communicate with me but instead it’s like pulling teeth.

What should I do? Communication has been an on going issue and I can only take so much