What is going on?

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I need help!? The last time I had sex was either June 11 or the 14 after that I got my period on the 24 and it was a regular 4 day period. But ever since then I haven’t gotten my period and I’m doubting if I’m pregnant or if it’s something else with my health? Please help me out I have no one else to ask some people tell me I can’t be pregnant if I got my period and others tell me I might me pregnant