No periods. Can i prepone my periods?

Missed period in Sep for first time, completed Meprate 5 day course, got periods after a week, TSH,sugar normal, prolactin - 50 ng, pregnancy neg. One week last day of period in Oct, got period like light bleeding continued for 8 days, took Trantas MF 3× 3 days to stop to get Ultrasound done, did pelvic ultrasound 17 days after last day of period. Ultrasound- dominant follicle left ovary (28x19mm). Started cabergoline 0.5mg course, took 1 dose on 14th Nov (once a week x 4). Got Last cycle on 13th Oct after meprate course, as per that this month it's 13 days late, haven't got till now.  Maintaining healthy diet and lifestyle. Have been advised to take Novelon for 21 days after getting period on 2nd day onwards but have not got period yet When will I get my cycle this month? What should I do to get my periods?  Please help I have function to attend next week from 2nd dec, can I prepone my periods?