Thanks for all these additional details.
Well, Levonorgestrel has to be taken within 72 hours (three days) of sex to prevent pregnancy.
As you have taken after 2 hours, so this was good time, and would be fully effective.
No need to get panic, You would not get pregnancy from that act.
Efficacy is better if the tablet is taken as soon as possible after unprotected intercourse.
You are completely safe.
Such nausea, hormone imbalance is common with such emergency contraceptive pill. No need to get panic.
Also, you may experience, change in cycle timing, due to hormonal imbalance. This can happen due to side effect of this pill. Usually it is temporary, and such side effects would get resolve by its own.
I would not be worried for pregnancy. You are completely safe.
I hope this helps.
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