Would you be mad about this or am I just being dramatic?

Remember, your friends have no idea what you were going through with your Mom and the cleaning, etc. So you were already irritated when you talked to the first friend. They also weren't aware you were under a time limit with your Mom. On the other hand, they should have called you back and at least said, hey, we are not coming over, were up to something else. It was rude the way it was handled. I'm thinking they have moved on and you need to find some new friends. Good luck.