My Boyfriend And I Had Dry Sex Yesterday. He Had

My boyfriend and I had dry sex yesterday. He had his underwear and nylon short on while I didn't have anything on me. After sometime he came and I could see his shorts are wet a little. He says its my fluids that made it wet. I am afraid. I am a virgin and this was the first time I did something like this. I have PCOS so my periods are irregular. It's not due for another week. Should I be worried? Is there any chance of pregnancy?