Nipples hurt 4 DPO?

Co

I've been moody, crampy, nauseated, and very fatigued all day but my nipples have started hurting horribly. I can hardly stand to wear my shirt because they are so sensitive. They feel sore like they've been pinched for a long time. I got a positive ovulation test on Dec 30th. Is this just hormone changes after ovulation? How long can I expect it to last?