Signs or no ??

Me and my boyfriend have sex a lot but recently he's been saying I'm more tighter than usual so I done a cervix check and it's high and soft, I've been extremely tired doesn't matter how much I sleep, and now and then I feel a little nauseous, I have also got frequent urination and my mood is so moody and up and down, and my sex drive is so low.. 
Is this a sign I could be pregnant ??