Help :/ kindof embarassed and feel weird now.?

Ok so today we have conditioning/ weight training for off season basketball (I'm on the varsity team in hgihschool). My basketball coaches are both male and my period decides it wants to show up in the morning before I went to school. I don't know why but during 7th period I had the worst cramps of my life and after 7th period we go straight to training. I didn't want to tell my coach but I had no choice so I said my stomach was hurting really bad but he asked if it was somethng that I ate, I said I had cramps, he kindof stood there for a second looking at me and said ok you can call your mom to pick you up. Soo my question is do you think he know I was on my period? Like becuase of my mood all day and me saying i had cramps? Tomoro is guna feel soo weird :/ (I'm in his 4th period class)