Suggest Treatment For Stomach Pain And Sore Breasts After Sexual Intercourse

So I Lost My Virginity Six Days Ago. Now My Stomach Is Feeling Very Hard And I Feel As If I Am Pregnant. My Breast Hurt And I Am So Worried I May Be Pregnant. We Used Protection But Since Both Of Us Were Virgins We Had No Idea What We Were Doing. Also, Lately I've Had The Urge To Use The Bathroom Alot But It Is Just Urine Since I Have Had Zero Appetite. I Am So Worried.I Need Help!!!