Not unless they come to seek you out ("ICE"). None really, unless and until come into contact with either law enforcement or DHS agencies. Will always be able to adjust status later based on a marriage to a USC.
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Government officials could force you to leave the country if you are here unlawfully.
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Deportation from the US and possible 10 year bar from re entering the US once you leave. If you are young and want a future in the US, find a way to stay legally here. Talk to a lawyer to see the best options.
I am a lawyer but I am not your lawyer unless we have spoken and we have entered into an attorney-client relationship. Due to the nature of this forum, I often do not have all the information required to provide legal advice. Accordingly, my responses on Avvo are intended as general and not legal advice.