is this normal

so i started crew a month or two ago and I have since then i have had spottings but no period. It’s been intense workouts and i’ve lost like 10 pounds but I didn’t think that would stop my period. can someone tell me if this is normal. I really don’t want to have to talk to my mom about this for hours because she will think i’m pregnant or something but i’ve never had sex so. can someone help me?