on mini pill for a month an a half but have had no bleeding

Hi,
Welcome to ehealthforum,
If you are breastfeeding your baby along with being on the mini-pill, then the absence of periods could be attributed to lactation amenorrhea. If you are not breastfeeding, then it could be considered normal to miss 1-2periods while being on hormonal birth control pills. However, chances of pregnancy cannot be ruled out completely (especially if you were sexually active without protection during first 3 weeks of starting with the birth control pills). Most hormonal contraceptive pills start giving effective protection after about 3-4 weeks of regular use, hence you are recommended to use additional protection if having intercourse during first 3-4 weeks. Wait and watch for your periods. If pregnancy is suspected, look out for development of any new symptoms, and consider visiting your gynecologist/obstetrician for examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Drink plenty of water. Take adequate rest. Maintain healthy diet. Be in regular follow-up and monitoring of your treating gynecologist/obstetrician and report any unusual/abnormal/new symptoms immediately.
Take care.