Recently i have had dark urine, im a female, and one sided headaches. i have had some pelvic pain. my nose bled a little bit today also.

See your doctor: You should visit your doctor. He/she will listen to you, perform an examination, possibly run some tests and find out what's going on.

Unrelated: This constellation of symptoms doesn't give a good suggestion of a single underlying cause. You may be a little dehydrated, or having some allergy problems. While these could possibly go with pregnancy, they are too vague and non-specific to make an educated guess for a single cause.