Pregnancy scare

Okay so I had sex on the first of January and we used two condoms. He only came in one and they were both not broken because we carefully checked after. But I’m still afraid because I keep thinking what if he touched himself after the first ejaculation and then put semen on the second condom or I don’t know. All I’m thinking is that somehow semen got inside of me. I was also on my fertile period. And now my period should come and yesterday I’ve had horrible cramps like I do when I’m on my period. And today I saw some blood in my CM and I’m afraid it’s implantation because my period hasn’t come yet. I know I’m being paranoid but I want to know if there is a chance. I’m also peeing frequently.