Any woman in perimenopause had this problem?

I'm in an active perimenopause at the moment. I haven't had a period since February of this year. I've had high stress since the first of March. I've dealt with the loss of my husband's father, my husband's uncle, breaking foot, having surgery on arm. After all the stress left then I wake up on Wednesday to have a little surprise of a light period again. My sister is also in perimenopause and came in after 5 months. I know that women come sometimes cycle together but this is ridiculous. It isn't bad just annoying. I was enjoying the freedom and now this. My mother entered menopause at age 48 and my aunt at age 56. I think I'm going to go for a few more years. I don't want to go on birth control because of the risk factors. I am taking supplements that my doctor recommended last year though which balanced my hormone levels. I might have to have the levels rechecked again. Has anyone else had this problem? I know that my doctor told me that after 12 months you are considered to be in menopause. Thanks.