Labs or no labs?

So I have been ttc #2 for 10 months and I’m due to get my period next week. I finally found a NP at a new clinic and she wanted to test my sex hormones as she thinks I may have low progesterone. (It took 14 months for #1, born in August 2015)

My labs are scheduled for this evening but I am having a lot of breast tenderness! Which seems a little out of the ordinary for me. Thinking I might actually be pregnant!

Should I still have my labs done today?!