Mid cycle spotting, could I be pregnant.

My circle is 24/25 days long and i had my periods from the 9th to the 13th of February 2017, i think i ovulated on the 19th of February which is day day 11 of my cycle. Now on the 22nd of February 2017 in the evening which is day 14 of my circle I saw pink blood on the toilet paper when I went to the loo, but agh I slept it away. However on day 15 which is the 23rd of February there was now a brown discharge coming out. Today (25/02/2017) theres nothing. I did an ovulation test and it came back positive but a pregnancy test was negative. I believe my periods are day away, they should start on the 6th of March 2017. Nb from the day my periods ended to the morning of the spotting we have been doing the baby dance with hubby. And we have been trying to conceive for about 11months now. Could I be pregnant?