Hi! I Have A Potential Pregnancy Scare Question For You.

Hi! I have a potential pregnancy scare question for you. Almost 2 weeks ago this guy barely stuck his finger in my vagina. His finger did have pre ejaculate on it. I do realize that this does impose some pregnancy risk, especially because this was during my fertile time. I have been experiencing some symptoms you could say. Do you believe that it would be too early to have symptoms or are these due to a possible pregnancy? First of all I have had a terrible cold with a cough as well with a fever. I've taken antibiotics over the week and am slightly better, but still sick. I have been frantically researching my "symptoms" and read that a cold is a possible early pregnancy system due to the embryo wearing the immune system. Also, over the past few days my left lower abdomen has been hurting constantly.Are these just cramps because I am do for my period in almost a week? Lastly, my breasts started hurting about two days ago? Again is this because I could be pregnant or is it possibly due to PMS or my breasts growing. I am still quite young so that is a factor. Please let me know what you think as a medical professional! Thanks so much in advance!
Also, I am going to start some sort of birth control method, as I do realize the importance of it now haha
Thanks!!