I keep getting bfn :(

My last period was Oct 31st and I haven't had a period since. Starting Dec 1st i kept getting almost positive opks up until Dec 23rd I finally got a positive opk and we're positive until about the 27th. I've taken many hpts but all negative. I'm always hungry and crave only spicy food and I'm tired all the time and I get a lot of stretching like pains around my back and lower abdomen. I feel like I may be pregnant but has anything like this happened to any of you ? Tia !

*had 2 miscarriages last year