The blood pressure I can't help you with. But on the nosebleeds just generally I have a couple of words of advice on how to stop them (from someone who has had a ton during the course of his life) and how to help prevent them in the first place.
Forget stuffing tissues, cotton, etc. up your nose once it's bleeding, because once you take them out your nose will usually start bleeding again.
Sit up straight, or stand up even, just don't lay down. Then, just push on the outside of your nose (the side that's bleeding of course) with your first finger and just keep applying direct pressure for several minutes. Firmly, but not too hard. That's it. That's the quickest way to stop them.
About 1 in every 16 males have a condition in their noses where, instead of having several small veins running at or near the surface, have 1 large one instead. I was among the 1 in 16. If you live in an area that is dry, and/or is very cold in the winter, this also tends to dry out the inside of your nose, causing the mucuous to get hard and crusty. Blowing your nose even, can cause these to rip off and a nose bleed immediately follows.
I ended up having surgery when I was about 19 because the problem was so chronic. I was put to sleep, and then they shattered that large vein and usually it grows back with several smaller ones. I did that, and then had it cauterized, to boot. I still get them, but nothing of the magnitude I used to go through........ sometimes I'd wake up in the middle of the night, the pillow soaked. Looked like a murder scene.
If you're one of the 1 in 16, androgens probably just aggravate the situation with higher blood pressure.
Another tip...........
Pick up some KY Jelly at your local pharmacy. If the inside of your nose tends to dry out, 2 or 3 times a day as needed, put a little on your finger (or Q-tip of you're hung up about putting your finger up your nose

) and rub it around the inside of your nose. It will help to keep it from drying out. DON'T use vaseline, it will only make things worse.
Good luck