Already 5 days late period after last month period due

My last period on September 18th and I had a sex at October 9th. When I had a sex on foreplay I didn't used condom or something safety. And then my partner put a pillow under my pelvis, I don't know after he take a break and took something on his wardrobe but I think he maybe took a condoms, because he organism in my vagina, I didn't felt warm kind of sperm cum. But after 1 week, I felt diffrent of my body. My breast become very soft but haven't get spotting. Can you know what have I do??