I am 22 days late, Pregnancy?

Im almost 17, My last period ended on Febuary 7th...
It is now March 20th.. I am 22 days late
... I had sex on March 3rd, with a guy i have been friends with for a while, it was my first time. He used a condom, and it didnt even last long enough for him to ejaculate into me because my friends mom was walking down the stairs, the Condom did not break. i have been stressing myself out really bad, i have some syptoms like i am really tired, but that could be from school and Track. I have bloating and cramps, and Clear discharge wich i always get, my boobs are slightly sore but not alot, and i am not nausious at all. I Also drink when i go out with my friends, so ive been doing that.. Im starting to get worried that I am pregnant.. do you think its possible??? PLEASE HELP