Missed Periods and Menopause at 25?

I’ve been under some extreme stress lately with my spouse being away.. basically being a single mom, running the house, handling finances, 2 jobs etc for almost 6 weeks. With one week home in between, which was suppose to be my period week. It never came. Many pregnancy tests are negative. I feel like I had a hot flash last night, and generally speaking I don’t sleep well either. Worried about what this may be? Menopause relates to the symptoms but I’m only 25.. post partum almost a year.