Hi, I'm A Young, Athletic Female, But Lately I've Been

Hi, I'm a young, athletic female, but lately I've been feeling off. I'm starving all the time, yet losing weight, I'm having much more frequent bowel movements (3-5 times a day as opposed to once), I'm anxious and irritable as well. Today, I'm currently in the second of two "episodes" where I feel like my heart is pounding out of my chest, like I can't breathe properly, I'm dizzy and foggy, and as I type this my fingers are tingly and my feet feel a little numb. This feels a little scary, should I be concerned?