It all depends on when you took the pill, as if taken within 24 hours the pill has a 98% efficacy, if taken within 24-48 hours it has a 85% efficacy and if taken within 48-72 hours it has a 58% efficacy.
Your other symptoms could purely be hormonal
, so please wait and conduct a home pregnancy
test using an early morning sample if you do not see your periods within the next week. Report to a doctor after that.
Hope this helps.