i had last AF on 2nd jan, which lasted 3 weeks.around 24th i thought i may be o'ing, tho im never sure. we bd on 26th and 2nd. I have irregular cycles and it usual for them to be months apart. however this month i have felt different. i have had very sore boobs for about 2 weeks now and the last few days have had really bad cramps. today i have had some very light spotting.If its AF its very early for me (which would be good too), but was also wondering whether it could be implantation.would it be about the right time?