It could be a sign of many different things
yes tender breasts are a sign of ovulation and pregnancy as well though not necessarily..
It really depends on your body. I don't, but they are when I am starting my period. It is best to check for other symptoms as well. If you are in Canada Dollarama sells ovulation tests as well as their pregnancy tests.
We don't know when you're ovulating. Tender breasts can be a symptom of ovulation, yes.