OPK assistance! (Pic)

Sabrina • Married my BFF 02/2014! Been "actively" TTC#1 since June 2014.
Hi ladies!
​This is my first time posting, and thought I had this opk thing under control but... I have been Without my Mirena for 4 months (approx) and didn't have a period for the 2 years it was in. So, hubby and I decided we would wait until I had my cycles under control before we actually started "trying" to have a baby. However, we aren't preventing either and still nothing for the last few months.  
​So, I started using opk's to try and help figure out when I was ovulating and would have OBVIOUS negatives every month, all month. Until today (the second to last day of my fertile window according to Glow). And I get this result:
 
​it looks close, right? It's not quite as dark, but I think I am getting close to my surge. What do you think? Maybe it will get darker when I test this evening? After 4 months of testing (sometimes) 3 times a day so as not to miss it, and still nothing, this is new!