I’ve been testing as I had the ovulation cramps so I kind of know when ovulation, and until now all negative. Yesterday evening started with cramps that were very similar with period, with lower back pain quite strong. Now is late afternoon but no signs of period and cramps still happening once in a while. Anyone has similar or it’s probably period starting? Wondering as usually when I have this cramps the period starts after few hours and it’s been almost 24h and nothing!