hello i got my depo shot for the 3rd time on june 21 and i had unprotected sex 4 times on the 29th of june lately i have been feeling tired more than normal and i crave some foods late at night i took a home test on the 15th of july and it came up negitive but i also have been having a change in my discharge its thick and stick and i have been spotting for the last couple days every once in awhile and i have been getting headaches and feeling kind of light headed after i eat and i have a have trouble breathing sometimes and my nipples have been feeling kind of sensitive the last couple of days i just need to know if i could be pregnant if i am i will be excited so tell me all the opinons please and thank you every bit of info helps