Talk to Gynecologist on Periods Irregularity Issue

mjy start sy hi periods ka problem ha kbhi kisi ny is k about guide nahiiii kiya so mjy k6 pata b nahiiii tha mjy idea nahiiii tha k periods myn regularity hoti ha yeah some thing like this..... mjy 20 years ki age myn pata challa k periods myn regularity hoti ha tu myn ny Dr. sy check up krwaya & Dr. ny mjy "Rimona" & "myfol" tablets suggest ki thi jo k myn ny li tu k6 time tk mry periods regular rahy.... But ab again medicine lainy k bawjood issue resolve nahiiii ho raha...... mra issue yh ha k mjy bohut kum bleeding hoti ha (just few drops per day) but bleeding ka yh period continuesly 2 to 3+ weeks tk chalta ha ( in 2 to 3 weeks myn just 5 to 6 days hi proper bleeding hoti ha )...... Now I'm 21 years old.... Mjy kys krna ho ga Dr.?