Pregnant or stressed?!

My last period started on October 14th. I usually have longer cycles and I’m not on any form of birth control. I did have unprotected sex but he did not finish inside, and it wasn’t in the ovulation window according to the cal on this app. I took two pregnancy tests last week and the week before and they both came back clearly negative. I however still haven’t gotten my period... it’s been over a year since I’ve been active so maybe my body’s not used to it and somehow delayed because of it?

Last time I was very active this happened all the time. If I was expecting my period in the next few days and I had sex, it would delay. I guess I just need a second opinion

Thank you in advance❤️