I havent experience any of the symptom of pregnancy except soreness of breast

My period hasnt come yet, me and my bf had s** twice. My last period was March 10, we did it last march 23 nd 30 using male condom. I havent experience any of the symptom of pregnancy except soreness of breast...and these past fews days ive been under a lot of stress due to work load and evrything... Supposedly im expecting my period this 10th of april but until now it hasnt come yet..could i be pregnant or its just because of the stress that ive been through that's why my cycle has been affected.. pls hellpppp... thnks..