Delay in sending picture text messages

I'd say over the past couple days, I am having the same issue.  It takes a long time for photos to be sent.  I have a Note 9.  Sometimes it takes 10-20 minutes.  

I'd say over the last month or so, continuing to today…...I find that a lot of text messages do not go through.  I get the exclamation mark saying failed to send. More times than not, it's just a standard text.  I keep hitting resend, and eventually it goes through