18 DPO, Negative results, IM SO CONFUSED!

Me and my SO have been trying for a baby. I’m 18DPO and I’m getting a negative result. I don’t know why. I’ve looked everywhere online to figure out what’s going on but I haven’t put a finger on it. Light to moderate cramps and I’m having to pee more than usual... not sure!! Whenever I was previously pregnant (before miscarriage) I didn’t really feel this way and I can’t remember how many DPO I was when I got my positive result. 😞😞🆘 Maybe I’m not sure how a healthy pregnancy should go?? Idk, help!!