May not be causing any problems but your body is showing visible signs of problems by your nails being affected in the first place. Ask to see the blood work. Ask them to check your vitamin levels like iron, B12, folic acid, vit D, calcium, everything. Have them check your blood sugar, inflammation in your body, blood count, every blood test under the sun and ask to see those results and ask what the normal range is for each. If they don't have time to answer your questions, get a copy of those tests and find another doctor (keep seeing the current one until you find someone else).
You may still be technically in the normal range for everything but your body is obviously showing signs that you're low on something and probably multiple things (even being low can cause unwanted symptoms). Iron for sure because of the bleeding and supplements alone may not help but you can always try. There are slow release iron tabs out there but the milligrams may not be enough. You have to know how low you are cause you don't want to take too much. The supplements themselves wont be too much but you need to know how many you should take at a time and how often. It takes 650mg of iron everyday just for me to be in the mid normal range. Blood work needs to be done before and after you start supplements and then again many months later to see if you're still within normal range.
I'm 29 and female and have had more radiation than Chernobyl (jk, not that much but you get the point). Can't fear radiation when you're well being and life may be in danger from uncontrolled bleeding. A CT scan with and without contrast may be in order along with an ultrasound, pill cam, barium swallow and enema with x-ray (stuff I listed in my first post basically). Still need to speak with your gynecologist as well.