i am having alot of gas, nautiousness, tired alot, feeling bloaded alot, lower stomach poking out a lil now looks like its bloaded, and crazy cravings in food and pains like cramping. I had spotting off and on these past two weeks but the past 4 dys nothing i had my first depo shot about a month and a week ago but had unprotected sex 3 days after i got it. Is this normal or could i possibly be pragnant?