Chances...? Scared

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So I had sex yesterday and July 5th and he never finished in me he finished on my chest but I saw that the condom had broken... I had just gotten off my period like 2 days ago and I'm not fertile for 5 more days. I was so worried so I took a plan b at 10pm and I had sex around 2:50-3pm ( so I took it within 24 hours) I'm so worried because I'm not on birth control and I am not wanting to have a baby right now.. I am super stressing. Please helppp! I took a plan b, am I fine?