My period stopped? Is this stress? Negative pregnancy test?

So I'm only 23. I've been on the birth control pill since I was 17 but I have never really had problems with my period before. It's been late a few times on the pill and I have missed a period here and there, but this time it has been two months since my last period. I took a pregnancy test and it is negative. (I plan on testing again tho, just to be sure.) But I am getting a bit worried. My life has been a mess lately. My grandma passed last August, she was my best friend so that caused me immense grief. Then 6 months later, my grandpa passed unexpectedly and I've been anxiety ridden over mortality and grief. Then I started a second job on top of my anxiety and mourning. And to top it all off, I was having trouble with my long term partner and we broke up. Could it just be stress? Or should I see a doctor? I've been pretty stressed before and I still had my period, tho.. what could this mean?

My period stopped? Is this stress? Negative pregnancy test?
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