What Causes Vaginal Discharge And Nausea?

My period was late in june and then i got another one in july at the same time but it wasnt as long or as bad as it usually is i have been pretty tired latley but sometimes its hard for me to fall asleep also my stomach has hurt alot latley mostly in the morning and when i lay down to go to bed sometimes its just in the middle of the day i get nausea and cramps i have had alot of diahreah and now smells are making me sick to my stomach i havent been eating as much as i usually do but i want alot of sweet stuff and i usually dont eat sweet stuff me and my boyfried have sex alot but we dont use any protection he just pulls out and he has pulled out everytime and latley i havent really felt like having sex and i have had an abundance of white discharge the past 2 months could i be preagnant and what r the chances of me being pregnant