Need Advice

Mely

So my period is 4days late. I don't have any symptoms of it coming on. I verified with my glow calendar that I did have sex on my ovulation day. So I just knew I was pregnant. I just took a dollar tree test and its negative. My question is what's next? I want to wait til next Sunday to take another PT if AF doesn't come by then. Should I go for a more PT but not the dollar tree test and make sure I do my morning urine? Since my myomectomy in October my period has be on time and on track. If I'm not pregnant then what else should I be concern about?