Hoping not pregnant

My boyfriend and I have been very careful to use a condom and spermicide film. One day before my calendar said that I was supposed to ovulate we followed directions for both but the condom came off inside me. He did not finish inside me and there was nothing in the condom when I pulled it out.  I am still freaking out though. I had a bad experience with the ortho evra patch and I went off of it at the end of March. I think my cycle is still slightly wacky from it. I am supposed to get my period today but I am still nervous. I have been having cramping for weeks now. I took a pregnancy test on Friday and it was negative. Just wondering if someone could help calm me down. Thanks y'all!