Help plz!?!

Ok so I am getting really confused. I was suppose to start my period today and nothing. I took a test this morning and a BFN. With my first I didnt get a positive til I was 5 weeks. I check my cervix everyday. Normally the day of even if I dont start its low and firm. Today it is high, soft, and tightly closed. I have sore boobs, increased urination, morning sickness, and my areolas are dark. Is it possible I could be pregnant or what is another explanation? I am so confused. I had what I thought was Implantation bleeding about 1 week ago. It was just a few drops of pinkish blood on the tp. 😕