My partner gets dark bleeding this month. Could this be implantation bleeding?

Hello doctor,

My partner is suspecting that she might be pregnant. We did get intimate but did not do sexual intercourse. We doubt if any sperm had gone in her vagina accidentally because I had touched her vagina with my hand, and there was no direct contact.

Also, it was her ovulation time. Two weeks after that, she started having some spotting, dark brown, and it was her usual time for periods. After some time, the bleeding started. Usually, her bleeding lasts for about five days, but this time it went only for three days, and the bleeding was less. She said the bleeding was dark red, and she fears it is implantation bleeding. What I read was implantation bleeding would either be dark brown or pinkish instead of red.

I need to figure out if this is pregnancy or just changes in her periods because she is scared to get a test. After all, it is happening before our marriage. She also said she had some vomiting sensation, breast pain, and tiredness. But I have seen this happen even in her normal periods, but the breast pain is happening for the first time. I do know the bleeding was dark red in color and not dark brown for implantation bleeding. Only the spotting was dark brown. The bleeding happened for three days out of five days. Is this normal periods or chances of pregnancy? And is this implantation bleeding? She is very stressed. Kindly advise.