I just wanted some feed back because I still have a little while to wait-and worry

So I started my period on August 7th and I had sex for the first time ever on the 11th the last day of my period. My "cycle" is typically 28 days sometimes 26-27 my point being my period usually comes a couple days early. It's been 9 days and I've had an upset stomach/slight nausea and the past couple days I have had increased discharge (this is my scheduled ovulation time) and my breasts are slightly sore but that is normal for me a week or 2 before I start my period and I usually discharge right before I start but I'm worried the discharge is a sign of pregnancy. We used the pull out method and he is 90% sure he didn't cum inside. I just wanted some feed back because I still have a little while to wait-and worry. Std's and STI's are not a possibility.