Ok soo

My fiance and I have had sex 4 times this week. We did have sex last night. But after sex I feel like I could throw up or I get bad stomach cramps. Also my boobs are very sore and it hurts when someone puts pressure on my stomach. Like when my fiance was leaning over me to grab our puppy he leaned on my stomach and it hurt a little. I also have been eating more then normal and craving certain things. My puppy is also a daddys girl she doesnt care about me but she has been clinging on to me more the normal she always wants me to hold her. She follows me everywhere and when she sleeps she has to lay her head on my stomach.I know it would be too early to be showing symptoms and I'm not assuming I'm pregnant. Does this happen to anyone else? What's wrong with me?