Overreacting?

My wedding is on Saturday and my brother and sister-in-law are part of the bridal party. My brother has done nothing for my fiance up until now. My sister-in-law threw me a shower which was very nice (I threw her one when they got married) but has complained and not particpated in anything else. The night of my bachlorette party, she planned my nieces birthday party(not her birth date) Friday the bridal party is getting mani,pedis and lunch and she isnt going. She has complained about driving 30 minutes to pick up her dress so I picked it up for her.



Two weeks ago I let her and my brother know that tuxes would need to be picked up today. I texted this morning to confirm he was going to pick it up and his response was, "I have to work. I will try to pick it up this week." When I told him he has to go this week because the wedding is saturday his response was, "Well, thats the best I can do." Floored and upset, I texted my sister-in-law to see how we can ensure he gets his tux as I cant wonder whether he will get it this week with the wedding 4 days away. She responded that I need to understand that he works full-time and the tux shop is 45 mins away and I cant expect him to drop everything (I work full time as well. He works from home. They have two children who are both in school all day). Needless to say I said that they need to find a way to get it. She then told me not to start with her as they have gone above and beyond for my wedding. Needless to say, the responses back and forth werent pretty and I finally said I was done arguing.
They then had my father drive the 45 mins to get both his own and my brothers tux. That normally would have been fine but my father suffers from dementia and easily gets lost and should not be driving like that!
Needless to say I am so upset and my mother is telling me to forget it and its fixed because he has his tux but I cant.
Was I asking too much and how do I move past this with them being that the wedding is 4 days away?