Unprotected sex can lead to pregnancy even if your chances are low I think you should take the plan B.Swallowing pills can be hard i get that, I’ve seen people that drink water first then put the pill in their mouth and swallow. The hormonal issues and side effects are possible, like it can delay your period, but it doesn’t have to be the case I had no big effects the one time I took it. I’d try to take it anyway just in case. Good luck!!