Birth control and periods

Patient: I am 20 years.female.unmarried.i had been using diene since feb,then stoped using it,got periods on 4th feb then on 17 feb.both lasted 5 days..then i had periods on 1st march.on 9th march my bf fingered me n said he doubts tht it was covered with semen so i should take some pill. i got nervous and took 7 diene tablets,and gynaecosid on next 2 days,then i had periods on 18th i am again having periods from there anything wrong with me?will an ultrasound reveal all the blunders?i am afraid…please tell me if i should go with my mother to a doctor or will it make things difficult?