Suggest Remedy For Irregular Spotting Between Periods

I am 38 yrs. old, unmarried. I am undergoing currently irregular period i.e. in a single month, it is observed that after 2/3 days of period, there is a gap and then again it starts and for a substantial segment of a month, this irregularity continues. The effluent is blackish. I suffered from chicken pox 3 months before. Then I took some homeopathic medicines to delay my period. After that this problem got prominent. Please suggest me the remedy.