Could I be pregnant?!

As some of you know; I lost my first born son 13 hrs after he was born a year and three months ago. I have PCOS and I’m on metformin. I took clomid for four rounds and this month I decided to take a break. However I’m two days late. After they got me regular I’ve been like clock work. I’m crampy but it’s like my uterus is stretching crampy. I have thick white discharge , my boobs hurt, nausea at times, tired, wanting certain foods, etc. I took a test two days ago and got a bfn. I’m praying for our rainbow, but I’m nervous. I want to be pregnant I badly. Could I be overreacting ? Please let me know your thoughts .