Is Ovulation Possible After 8 Weeks Of Giving Birth To A Baby?

I gave birth almost 8 weeks ago. I started charting my temps at 4 weeks. I'm seeing all my normal fertility signs..... EWCM, high soft cervix, and ovulation pains. My temps, however, have been much lower (almost an entire degree lower) than they were when I was charting before this last pregnancy. I am up usually 3 times each night with my newborn, but I take my temp the same time each morning. Is it possible I already ovulated but didn't see the shift because I'm up so many times at night?