Falling pregnant on the depo?

Sammi • 25yrs old, Mumma of 1 beautiful daughter (3) married for 4yrs & just got my BFP after 1.4yrs TTC #2 ❤️
My depo doesn't officially wear off for another 2 and a half weeks but last night out of the blue I threw up! I haven't vomited since i was pregnant with my daughter (now 18 months) and with her I spewed everyday, sometimes twice a day from 5-36 weeks even being hospitalised!
​I can't help but hope that I maybe pregnant as I've been bloated, mood swings etc also... What do you think? Possible??