Please help i have questions!

Kerri
My cycles are about 30 days my last period was 5/19 and this period is suppose to be 6/17. I counted back starting with 6/17 to the 14th day which is thursday 6/4 which is 14th day right? Isnt that my most fertile day or no because my cycle is 30!days? Glow is saying im 33% on tues and 8% on thur 6/4. I sometimes wonder if i could possibly be fertile the week after glow says im fertile could that be posdible?  Please help i really want a surprise for fathers day for my husband iv been trying for 6 months i think in the beginning i didnt know much but now im aware of more tips im hoping this month with your help can help me! I also was wondering should i have sex everyday of my fertile days or is it better everyother day? 
Thank you!