You shouldn't have to put up with that OP.
You didn't do anything wrong. It's not normal to send message after message like that.
I would like to see the posters who say you are being unreasonable explain how those messages are reasonable or justified.
Because I doubt they have lived under this kind of pressure, where you cannot say no to someone without them reacting like this.
With PILs, if they got their own way they were pleased, although if they got one thing they would push for a second and a third and nothing was ever quite good enough.
However if they didn't get their own way they got the drama, the upset, the shouting, the tears, the phone calls, the texts, even sometimes the letter writing.
A bad phone call with one of their adult children could result in a two hundred mile round trip to visit another one so they could be looked after while they were upset.
When we first married we lived a five hour drive away from them. I remember they came to stay for a week once. They had already been saying with BIL number 2 and his wife for a week, and came to us "on the way passed" which was actually about a 100 mile detour.
They left us on Saturday morning, and by teatime the same day FIL was on the phone to say they had rowed with BIL number 1 the minute they got home and MIL was so upset they needed to come back to our house.
I said no, they weren't happy about it. They rang BIL2 and said they were going back to him and he said no as well.
The entire family suffered for weeks because of this. DH was in bits because he'd grown up being told he couldn't say no to his mother without her having a breakdown that would be his fault.
Your posts about your Mum and her reactions remind me of them. Over the top, entirely selfish, and still making her the centre of attention even if that is in a negative way rather than positive one. It's still a chance for her to be right and you to be wrong and for everybody to feel sorry for her because of what you've done.
But you haven't done anything wrong at all so please don't blame yourself for any of this.
A normal person would have said they had something they wanted to give to you, or walked outside with your DD, or waited until Sunday.