5 days after unprotected sex (an my boyfriend ejaculated inside me) I feel unusual gurgling in my stomach, I've never felt this before & I know how my period feels so I know it's not that.. I also feel like nausea & fatigue.. And I had brown spotting , then light bleeding , then spotting , & now light bleeding..Can implantation bleeding occur in 5 days? Could this be ovulation ? & can I still be pregnant even though I'm ovulating ? Please help