Ahh, Tina. Some people just like to cause problems. I know this hurts, but just try to forget about it ---and her. It's not worth your time and effort worrying about.
You will be much better off getting ---and keeping---her out of your life!
I hate to see you so upset about this. It's not doing you (and your tummy) any good. Try to think about pleasant things today and put this behind you! You have Tommy and a great future ahead of you!