I am 58 and post menopause and not on HRT. There has been a decrease in estrogen in my body and an increase in testosterone. This is normal. It took me some time to get used to this change, as it has come with thinking and sometimes speaking more aggressively. I had had lots of dreams about me having a penis during that time.
The black lines or strings make me think of negative words, thoughts or feelings...attachments...that you are fearful to express. They also could be interpreted as semen, the way you described it...you might "see men" more negatively than you used to...or have a different, possibly lower level of tolerance for some of their behaviors. You might have a fear of unloading your negativity on others.