Am I too excited!?!?

Megan • Happily married. One 2015 angel baby, little girl born Sept 2016, & one due June 2019.
Hi! I'm 26 and my husband (30) and I have been TTC off and on for over 2 years. We've been happily married 2.5 years and cannot wait to start our family. We have a 3 year old furbaby who is a lovesble and crazy Great Dane/greyhound/pitbull mix. 
I had the mirena for 5 months and it made me crazy. Had it taken out in March 2013. No BC used since then. My doctor put me on metformin to regulate my cycles since they were anywhere from 45-90 days apart. Once I started taking it regularly my first two cycles were 28 days and the next two were 30 and 31 days, respectively. 
I've been tracking my bbt and opk monthly. This is the first month that my bbt rose and I got a pos opk on tr same day. And it was yesterday, CD15. I'm usually gettig pos opk on CD17-CD21. 
Our BD timing has been perfect this month and we used PreSeed too. I just feel that it's our time. Am I getting too far ahead of myself? I'm so excited but also a little reserved because I don't want to get my hopes up and be disappointed. 
Any suggestions!?!?