Tender nipples

Carina
This is the first time in my life that my nipples are so sensitive. They hurt even when I shower. I am currently on my second round of clomid. I got positive ovulation test a week ago. I red somewhere in here that some of you ladies were having the same nipples issue when you got pregnant. Like a first sign. But I just did a pregnancy test and it was negative. Should I get excited already and try another one later or just wait till my period is late?