HELP pregnant or could be pregnant ?

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Okay so i had my period 11/27 it only lasted 4 days. On a normal it last 6-7 days Ive been waking up with nausea feeling and acid reflux ive been throwing up bile every morning glow says i wasnt fertile until the 7-14