Help Please! Confused!

Hey, I’m not technically pregnant yet, although I would love to be. I haven’t been trying for a baby, however, missed my period which was due in late November. I got majorly excited, as I would love to have a child but both tests I have taken have come back negative. I know stress can cause missed periods too but symptom checkers have said I have pregnancy symptoms too. I would only be around a month/month and a half into my pregnancy if I was. Any suggestions? It’s stressing me out as I would love with every piece of me to be pregnant but if I’m not, I just want to know what is going on with my body. Thank you in advance <33