What Should I Do About Scanty Flow And Symptoms Of Low Estrogen While Having Difficulty In Conceiving?

Hi..I m a mother of three but youngest is 6 years...from last three years I m trying to conceive...but no success...I took clomid for 4 months but no results..menstrual cycle is of 28 days with scanty flow...low level estrogen complaints are feeling like cyclic knee pain and cyclic backache..what should I do? Can I get free answer