I am a female and I think I'm producing too much testosterone, how can I stop this ?

I am a 21 year old female and feel I am producing too much testosterone in my body, and it’s bugging me out. I’ve never had a test done to show my estrogen or hormone levels, but I think this is what’s happening to me. For about 6 months I’ve noticed an increase in different things :

More hair on my body, places girls don’t really get them, like more facial hair, hair on my chest and boobs, stomach hair etc.

I’ve been losing a lot of hair on my head, and it’s not as thick as it used to be – I have a reciding hairline. I’ve been feeling more aggressive too, more masculine, and I don’t know why these changes are happening to me. I find myself acting like a boy too, even the way I stand or walk or do things. I also noticed my boobs and butt have started to shrink.

I have no idea why my body is changing like this and the only thing I could come up with is having too much testosterone in my body.

I also went to the doctor and they said my thyroid is normal so it’s not that.

Help :(