My period was five days late then had brown discharge now bleeding kinda heavy red blood with no pain could i be pregnant i have been trying?

YES. A late period: followed by heavy bleeding could mean a pregnancy, including one that is threatening to miscarry. A positive pregnancy test would make this situation more likely. Regardless of the results of the test, since you're having unusual heavy & irregular bleeding and you're trying to conceive, you need to get medical care. Best wishes. Dr. Anne