HELP! am I pregnant?

My ex and I had sex (when we were still together) in late November. We ended up breaking up early December. I got, what I thought, was my period in December especially cause it came with all the symptoms and I was using the usual super tampons. I moved back to school in January and didn’t get my period so I took a pregnancy test late January that was negative. It’s now February 25th and I have not yet gotten my period for February. I tested once at the beginning of feb, a the 19th, and again this morning and all were negative. I did have some pink discharge for one day and my legs have been twitching recently. I’m not sure if I’m pregnant and getting all of these false negative tests or I’m just so anxious about maybe being pregnant that I’m postponing my period further. Please give me some advice! I’m so scared