hi debbie,
my name is ray. My answer to you is yes you can get pregnant on the mini pill, i became pregnant twice. The mini pill is for breastfeeding mothers i became pregnant because i have a blood condition and i wasn't allowed on the normal pill, so i was on the mini pill for a couple of years.
If you a getting headaches and feeling dizzy my suggestions is stop taking it and find another conception, you can't function like that and look after a baby.
Goodluck with everything.

ray