Hello,
If you were on Alysena birth control pills on a regular basis, did not miss any pill, took all the pills at the same time everyday, you shouldn't be pregnant. However, the efficacy of the pills may get reduced in case of
vomiting, taking alcohol or addictions if any, taking other medicines simultaneously or missing the doses. In case you do not get your periods in time, you should get urine or blood tests for
pregnancy done.
Get clinically examined by a gynae since you are having
nausea,
dizziness, etc., so that pregnancy can be confirmed and managed accordingly. In the meantime, avoid stress and
anxiety, stay well hydrated and take home made nutritious food rich in minerals (iron, calcium) and protein.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician