Am I pregnant? PLEASE DONT IGNORE

Hi there. I’m 18 years old. My last period started on March 3 and ended on March 7. I had protected sex on March 9, we used a condom, there was no breaking or holes, and my partner never actually ejaculated at any point during the encounter. My period was planned to start 3-4 days ago, but still hasn’t arrived.

I will add that I had the flu around the time I ovulated, and I’m having a lot of anxiety about this situation, including a panic attack. I just need some insight about what’s going on with my body, and if I need to go take a pregnancy test. I’m not really having any symptoms of pregnancy. No implantation bleeding or spotting, no breast tenderness or nausea. I’m having some of my normal PMS symptoms, mostly abdominal cramps and diarrhea for the past week or so. I am struggling to eat and sleep, but I know this is an anxiety issue for me. My vagina is relatively dry - no discharge, and my cervix feels hard and low. Am I just freaking out? Or should I go purchase a test?

I also took some of the at home DIY tests - I know they are dumb but due to the current state of things, I gave them a try. I did the salt test, baking soda, and shampoo test and all came back negative, but I just feel so anxious and nervous.