sex strive birth control patch ovulation tests

Okay so my husband and I had our first child a beautiful healthy baby girl on February 6th 2017. she is 7 months now. I have been on the birth control patch for a long time but feel as if it makes my sex strive low! I love my husband i could not have done better he is truely the best there is. sex is great but we are not ready yet for baby number 2 I have pcos so my periods are weird and never right. I do ovulate but it could be 6 months before i do and have a period. I would like to get off my patch and just use ovulation tests to see when I am ovulating and either use condoms or not have sex. how often should i test and does anyone else do this? i need to know all about it.