3 MONTHS without period

I’m 19, and it’s been 3 months without my period. I haven’t been sexually active recently because my boyfriend and I are long distance. I have been extremely stressed due to work,COVID, and school. Idk if it just the stress but I recently started spotting a few days ago. Later on I went to the bathroom and there was more than just spots, it was a lot of blood. I put on a pad and cleaned up. I assumed it’s my period but it’s not as big of a flow that I usually have. I’m scared to talk to my mom about it. What do I do??