breastfeeding

Cinnamon
So I have an odd question. 
I asked in my breastfeeding group, but didn't get any replies.
My daughter was 2 on october 22, she's breastfed still, but I have been kinda keeping her off lately, because she'd want to nurse too often, 2 nights ago, and 3 nights ago, I let her nurse herself to sleep, before that she hadn't really nursed for 4 days or so. I noticed lastnight that my milk looks like colostrum, and it has sort of a bitter taste, not like breast milk is sweet but this was sorta salty tasting. She's refusing to nurse now 😔 my ovulation day was supposed to be highest yesterday, and my period was on the 6th and ended the 12th. My breast are tender, and normally they never are, do you guys think I could be pregnant, if it would be from ovulating, or if it would be because isn't nursing as often? I'm going to get a test. But before I did I wanted to post here, I guess to see if anyone else has ever had that happen. 
(Pictures for attention 😍)