Help! Mom walked in on us having sex!

I'm 15 and my boyfriend is 15. We've been dating for 9 months. My mom put me on birth control about three months ago for acne and to lighten my flow but she's not stupid and knows we were going to have sex eventually. I didn't ask my parents if he could come over, as he is over every day automatically. He loves my family and they love him, but today my mom dropped my sister off at home after soccer and came upstairs to see me and my boyfriend bare ass naked doggy style in my bed going the hardest we have ever gone. I was moaning at the top of my lungs. She quickly walked in and then walked out, then left and went back to work. After that she texted me that he "had to go home please". WHAT DO I DO NOW!!??!!?