I was told in Dec I was in peri menopause

Patient: I was told in Dec I was in peri menopause with FSH LEVEL at 87.2 & I had missed my period.Ultra sound showed normal ovaries. BUT WOTH FOLLICLES.Then the next month I had a period & my FSH level was at 3.1IM CONFUSED! The doctors can’t seem to give an answer. Could something be wrong?

Doctor: