I need help!

This might be a little long so hang in there, please. I had my son in October 2015. I got prwgnant when he was 5 months old while I breastfeeding and everything. We weren't truing but we weren't preventing. I had my daughter in December 2016. She is 5 months old. We want to start trying for baby #3 at the end of the year because we want all of our kids close in age. I track ovulation because it helps me predict my periods, and so that I can know my cycles when we start trying. Well I took an ovulation test yesterday and it looked almost positive. One thing led to another last night and we didn't use any prevention. Please let me know if you think it is positive (it's the third one from the bottom) and if you think I could potentially get pregnant. There would be a 14 month she gap which is the same with my first 2!