Need advice?

Hi, my name is Shaelee. I’m 19 and a mom of a little girl. Last year in December, my man and I started trying for our second child. My cycles are supposed to be 23-25 days. We did the deed on December 31st and January 2nd. My last period was from December 22nd to 26th, and it usually lasts 5 days. My app says I should’ve started my period between the 14th and 16th since my cycle is 23-25 days long. Well, it’s now the 17th, and I’ve been cramping but still no period. Today, when I went to the bathroom, I saw some discharge. Could this be a sign of pregnancy or my period coming? Also, when I didn’t get my period yesterday, I took a 97¢ pregnancy test (don’t come at me, I barely have money right now), and it was negative! Last time I took a pregnancy test was in 2022, so I can’t remember that well. All I know is I took it a week after my missed period!