What is up with that?

Decided to take another ovulation test. And again it is positive. This is the 4th time just in this month. Took a pregnancy test also and that was negative. The first + this month was the 8th,  second + was the 15th or 16th, third + was the 20th or 21st and the last + was today the 29th. I took one opk last night and it was negative. Today I am at high fertility. We are so ready for another baby. Just not sure if it'll happen since its been 6-7 months of trying.