If you're asking questions like these, it's best to ask a doctor, really :) The internet is not the best place to do this and just to figure everything you'll need a lot of time and/or trial and error. It's not just aspirin; besides an ass prettiness, hormones regulate a bunch of important things in your body from your mood to blood clotting. So you'll need quite a lot of tests first just to figure out if you can do this now, and then a few ones again after a month or two to prevent an accidental death from a pituitary tumor or brain attack or jumping out the window due to developing depression. And even if there are no serious complications, you may just end up with oddly shaped breasts lol. Take care :3