Symptoms

Ok so I track my cycle on this app and my period is very regular....earlier this week I had very light spotting and cramps and then nothing else...and no period today either. My partner and I have been having sex unprotected. I have been more tired in the last 4 days then ever in my life lol. We had relations this afternoon and it wasnt till later this evening that I have noticed light pink spotting not regular red blood. Are these signs of a possible pregnancy? I dont want to jump to a conclusion like that but I am unsure of it all.

Thanks