Thanks for your query.
I is not compulsory for you to bleed after taking the pill.
As far as taking the pregnancy
test is concerned, please take it if you do not have a normal period upto 4 weeks after the episode of unprotected sex.
Also, with the Next choice
, your normal period might be preponed or postponed by a week or more.
Regarding your symptoms, they are non specific, and do not point to a pregnancy.