Does Sore Breast, Light Vaginal Bleeding And Belly Pain Indicate Pregnancy?

hello anyone or every one just one question my husband did vasectomy and am having irregular periods, but am having some weird feelings, first am having some serious belly pain like a burning sensation don't know exactly where for at least 3-4 days now and also for two days i have been seeing spots of blood when I wipe after using the toilet also I have be feeling dizzy when I stand up, walk or do some work, I am eating more than I normally eat and my breast is a little bigger than normal not sore though am wondering if am pregnant or not am afraid to take a test because I can't deal with the dissapointment if am not. need some help please.......thanks