HELP PERIOD LATE FOR FOUR DAYS

Hey guys, so my period is late four days and today and yesterday morning I felt dizzy for a few seconds... A few days ago I wanted to eat loads of chocolate but I always do before getting my period but now my appetite is normal again and usually I always want to eat before my period.... Now I don't :(... I just don't want to pregnant.. Need to finish college first at least... Are there any symptoms how I could find out what is going on? I can't wait for the pregnancy test... I'm too nervous... The best part is that my boyfriend is on the Mount Everest right now for 2 more weeks... :(