What Causes Bleeding Through Vagina And Nose During Lactation?

I am currently breast feeding my 8 month old baby. And I went to the bathroom and seen bright red blood in my underwear, I wouldnt say it was all blood but had some white or clear mucus in it too. Am not sure if this is something I should worry about. My history: I do not breast fed exclusively as the baby is also fed formula and is on solids. I would say I breast feed about 30% of the time in a month. I also felt light headed today and been having frequent nosebleeds that stop when pressure is applied to the nostrils.