Could i be pregnant

I was due for my second depo shot August 30 but didn't go because I wanted to ttc . Had my first flow on September 28 through October 3 and. I've been sexually active since my flow stopped and was active on my ovulation day. This week I've noticed my stomach has been very bloated ( my bf says I look pregnant) , I've been having sharp stomach pain throughout the day ,feeling nauseated, and having some light pink colored blood on the tissue after I pee.