worried about being pregnant any help ?? please 😕

Hey women out there I was wanting to ask for your opinion my last period ended on the 10th of this month me and my bad had sex on the 12th . It was unprotected but he pulled out and stroked until he came on my stomach. I was scared if be pregnant by Precum ? It's had to tell because I've Been having bad stomach problems lately and have been nauseous having gas and tenderness to my stomach it's the 23rd and I feel nausea still and I am belching I have a tender stomach and I had a uti but a few days into it I had clumpy cottage cheese like discharge . Please help me it would mean a lot .