What Causes Spotting Without The Actual Periods?

hi i m 26 years old my height is 5-3 and weight is 58kg i m married woman my marriage was held on 25 january we did a sex bt he did not transfer the sperms to me bqz yt he did bot want a baby bt ths tima i have a problem about my periods normally i have 6 days periods bt last month or ths month i gt 2 days heavy periods the flow is heavy bt on third day the flow is little bit its just a spot on a pad i m worried about it wht happen to with me p[lz ans me whats happening to with me