Spotting after my period?

Ch

Question has anyone has dwelt with spotting immediately after ur period is supposed to have stopped? Like my periods are regular 27 day cycles consistently. This month I had a 22 day cycle which was a little weird but it was what my glow chart predicted. My period normally only last for 5 days and the second day being the heaviest. Normally on the last day I barely have anything. Well this last period everything was normally up untill today, I started spotting again. My first day of my last period started on September 26, it should have stopped yesterday on the 30th and I thought it had...I had a miscarriage in june, I was 8 weeks when the miscarriage happened and have had 2 periods since the miscarriage and both were normal. Lasted 5 days no spotting afterwards. Last month my husband and I started to try again for a baby but it didn't happen. We both are really hoping this month would be the month, but now seeing as my period is abnormal, I'm wondering if I would still ovulate? I'm not sure when I should start using my ovulation strips now...