Suggest Treatment For A Vaginal Tear

This is an embarrassing situation.. I have a vaginal tear on the side, sort of inside me but not entirely. From the sounds of my researching it seems like it s probably a second degree tear. Probably about three quarters of an inch in length. It is extremely painful and burns when I pee and it looks like a gash because I can see inside it. I was curious if I should go into the doctor or if this is something I can treat at home... The more complex part is that I am now on my Period. Will this affect the healing process or increased chances of infection? And if I can treat at home how do I do it?