Help!

Nicola • Married. 29 years old. Mmc at 11 weeks July 2015 and mc at 4+3 weeks Nov 2015. Pregnant with baby girl due 30.07.17 ♡♡
I'm 30dpo today confirmed by opk. Lmp was 21st Jan. I'm now 2-3 weeks late for AF and getting bfns. I guess I didn't ovulate due to stress so my body is trying to ovulate again as I got a positive opk again last week. My opks turned negative a few days ago and are now positive again...what's going on? Is my body still trying to ovulate? I have had a blood test to test for pregnancy and should get my results mid next week x