Does AT&T text you if you have reached your data limit?

I just got an iphone this month and for the past week or so my imessage has not been working (everything is set up right-it's not the general settings)
I'm not sure if this is because I reached my data usage so it won't send messages anymore? (I'm still on Wi-Fi)
is there a reason for this?
the only thing i can think of is that i may have gone over/reached the limit on my data for the month, but I've heard they text you if that happens & i haven't received one

They do text you, contact your AT&T support and ask them because it may be their problem.

They send a text at 60% and then thats it

They send a text once you reach 65% data usage.

They also send a text once you reach 90% data usage.

if you've received neither of these, you're fine.

Also, go check the My AT&T app, you can track usage there.