Pregnant or not?

So I’m 20 days late. It’s been around 55 days since my last period. If I were to be pregnant I would be 6 or more weeks. I have no symptoms at all. No discharge at all and no sore boobs no cramping no implantation bleeding. I started competitively swimming again since 2 years ago and I have been super stressed over being pregnant or not for the past month too. Could it be that I missed my period because of excessive exercise?