What are the odds I'm pregnant?

Hi guys, thanks for taking the time to read this post! I was supposed to put my new nuvaring in on Thursday, October 13 but I put it in on the next day, Friday, October 14. On Sunday, October 16, my boyfriend and I had sex for the fourth time that day when he ejaculated in me. I'm not sure what my odds are since I did put the ring in on the day after it was supposed to go in and being it was the fourth time that day, there was probably significantly less semen that entered me. Since then I've had some slight cramping and sore/tender breasts, I'm not sure if this is from my nuvaring or me just psyching myself out. I did feel suddenly nauseous as well on the morning of Sunday, October 23 but that was the only episode of that. I began chatting with a Walgreens pharmacist online and he said he would highly recommend me taking a pregnancy test. What are the odds I'm pregnant? Is it too early for these types of symptoms to be associated with pregnancy? Do I have to wait until I potentially miss my period to take a test? And lastly, if I stress too much and push my period back past the given week time frame, will inserting the new nuvaring cause me to not have my period?

Thanks in advance for the help and input