Could I be Pregnant?

Hi, I need help on what to do in this situation.I have not had my period since (I'm not too sure) 23 of JAN. to the 7 of FEB. and I am very worried.My period is very weird and not really normal.Lately I been experiencing moodiness,some abdominal pains but not as severe, stressed 24/7, urinating more often,spotting,eating more than usual,and I been very tired.I have not taken a pregnancy test yet.I did not have sex,though I read it is possible to get pregnant even without intercourse if there is still semen left.I know you should always have your partner wearing a condom no matter what and I made a huge mistake.I am very young and should know better but please I am so scared/worried that I might be.Thank you for your time and Hopefully answer(s).

Read the article at the link below. It says:

"The egg remains viable, that is, alive for about 72 hours, but is capable of being fertilized for only about 12 - 24 hours. Intercourse has to take place within this narrow time frame (1-2 days before ovulation or immediately after ovulation), for a pregnancy to occur."

http://www.gynaeonline.com/normpreg.htm

Tbh I think you should just go and get a test before you keep worrying and make yourself worse, :) x