Could I Be Pregnant? Help Please!

I am 12DPO. My husband and I had unprotected sex during my ovulation. I have 4 children already, so I am very fertile. The past two days my breasts have been sore, my nipples have seemed like they are darker, my vaginal walls seem swollen, my cervix is medium height , soft and tilted way back towards my spine so I can not feel the opening which is very weird for me. I have been feeling like I could sleep forever after being totally awake and motivated for only 3 hours. I am craving chocolate like no ones business!!! Lol