Period question

Last month I spotted on the day I was supposed to get my period. It was so slightly. The following day my real period came. I ended ovulating earlier, like on the 12 th or 13 th day of my cycle, counting based on the day i got my period and not when i spotted ( day before getting my period)so i did ovulate on the 14th day based on spotting day...after doing a little bit of reading i understood i should count from the day my period came and not from the spotting day...... I always ve been regular 28 day cycle, and now this spotting. Today i was supposed to get my period and just spotted. I really want a second child, however my husband is lazy to dtd, no libido.. And he is on clomid... It helps a lot with his performance, but 0 with his libido. Long story short, i have to time  my ovulation very meticulously because i may dtd just once during ovulation period after humiliating begging. Its even more worry that we did conceive in 2 weeks our first baby, but infertility runs high in his family. So should i start counting my period from today? That i spotted? Or when my actual period is coming or start testing for ovulation from  day 9 in my cucle? I need opinion girls.