Am I being Paranoid!???

So I lost my virginity on September 21 and then I had sex again the next week on September 28, both times we used condoms and the pull out method. My next period is supposed to be next week on October 13 and since the last time I had sex (Friday) my body was sore saturday which is normal but I have had this faint pain/discomfort on my right abdominal side/pelvic area which feels alot like gas but it is now Tuesday and it has decreased a bit but it is still there and I can kinda feel gas but it is not really being released. Do I have something to worry about or could this be an gas pains / average pms gas symptom???