Sign of pregnant or period? Tender breast, cramping, (been about month sicne I cum on her pantie, she had her tampon in, didn't wipe the cum off after)

Tender breast. Tender breast and cramping can be a sign of pregnancy and a sign the period is going to start. If it has been a month, have her take a home pregnancy test and put the question to rest. Hope this helps and will relieve your stress.
CONSIDERING ALL. Those factors, chances of pregnancy are very low. However, she needs testing please.