What Are The Early Signs And Symptoms Of Pregnancy?

This is my first month starting my birth control back up in a long time. I started on a wednesday. My boyfriend ejaculated in me on tuesday. I started to bleed when I got to the blue pills. I called my pharmacy and they stated that it was because I doubled up one day. I have been feeling some cramping and the bleeding has stopped. I didn t get day after pill because I figured my bc would do the trick. Is it a possibility I could be pregnant?? If so, what s the percent chance? I am 22 years old and I have a 19 mth old baby. I suffer with fibroid tumors so I cramp alot anyway but when taking bc that usually calms it down.