Could I finally be pregnant?

Venus • Owner of Rosemary & Thyme Blog 🍨// Baby #1 born at 35 weeks🌻
My Hubby and I have been trying for baby #1 for 8 months. I haven't had a single pregnancy yet. 
It has been 3 weeks since the start of my last period. Within the past few days I have been having these symptoms: 
Horrible insomnia 
Tossing and turning all night
Crazy dreams! 
Lower Back pain 
Fatigue 
Stomach pains
Pain during sex 
Peeing more
I've gained two pounds 
Slight nausea every now and then
Seriously bloated
My nipples are super sore and sensitive, and redder than normal
Some of my symptoms feel like I will start my period any moment now but I still have a week until I start and my period is normally very regular. 
Could it be too soon to have pregnancy feelings? 
Could my period just start early this time? 
Is it possible to experience pregnancy symptoms at just 3 weeks? 
I will take a pt when my period is actually due, I am just curious for now as to what could be going on with my body.