Plan B pill

When I was about 15 years old I took a plan B pill because I though he cumed in me. Second time I took another pill was when I was 16-17 years old and I took another one when I was like 18 years old. My question here is that since I took so many would it affect having kids now? I'm am 20 years old about to turn 21 in a couple months. My boyfriend and I have talked about having baby's soon but I'm worried that, that can cause a problem. Please help. 
After the response I get here I'll have to decide to talk to my boyfriend about my past which I really hope I don't have to and let him know my pregnancy levels are very low. 
( if it does affect my pregnancy )
-Thank you

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