Hi I Am 25 Years Old . After 5 Years

Hi i am 25 years old . After 5 years of my married still i am not getting pregnant. I am having problem with my irregular period. Sometimes it continues to 10 to 15 days of bleeding . I have consulted to my local doctors and they advised me to take Trapic-mf tablets for 5 days and it worked for the first months but it happens on an every 2/3 months again i have to take the medicines to stop the bleeding but i want to know how get rid of this issue and want to get pregnant. Thanks in advance .