Have this ever happened to you?

Moms I feel like shit and I don't even know how to continue the day and be present.( I still learning how to deal with anxiety attacks even do is been a year since I had my first one, but still a little bit of a new world for me). So here is what happened I went to the museum with my 4 children and one of them 2 yrs old got lost for like idk 7 minutes I got the worst feeling of my life and started screaming her name and there was a little crowd of people and one lady tells me are you looking for your child I said yes and she says she is there. I immediately grabbed her and hugged her. And I'm very thankful to God I have her with me. But. Now that feeling of loosing her is eating me alive and all the what if... is taking the best of me... I wonder if any mom have go through the same and what did you do to not get anxiety attacks. They are bad to a point that makes me think I'm having a heart attack. I learned my lesson that I need to be extremely extra careful next time I go out with my kids but now I need to be there for them.