3 weeks ago I had unprotected ssex and 2 days ago I started noticing that my breast has been very sore and tender I feel teird and headaches non stop and also I have cramps on my rite side of the abdominal today the whole day.. my period is due in a week

Are these the usual symptoms you would feel if you are were going to start? It is really too early to start feeling symptoms of pregnancy, and two early for an HPT.