Early Pregnancy Symptoms?! HELP PLEASE

Hello all,
I need help I am on day four after having sex I haven't been feeling well, I've had really bad cramps that not even ibuprofen is helping and today I started to feel nauseuas. 
Is it possible to be nauseuas this early on?? 
The pain is somewhat bareable but it's like a 5 when I'm walking.
I haven't taken a pregnancy test I am suppose to take it next week. But I'm freaking out, because now is not a good time but everything happens for a reason and it would be a blessing but I'm hoping I am not. 
Anything is welcome because I really need to know. I am going to the doctor tomorrow to see how and or what they can do.