After Lifting Heavy I See That I Am Bleeding. I

After lifting heavy I see that I am bleeding. I am a female I work in a furniture and appliance store and sometimes lift mattresses and push wardrobes to assist in floor displays. In the last week I have been feeling very sensitive on my left side on my rib seven inches from my navel. Yesterday I pushed a mattress and felt a stabbing pain on my left side then about one hour later saw a red light discharge from my vagina.