I used to find for the first few days when I started back taking the pill I had a bad headache/migraine (that was on monofeme 28) but then it went and I was fine - this time I said yes to the generic of monofeme which was levlen and for the first month and a bit I had all the early pregnancy symptoms of tiredness and sickness and headaches (but not migraines) but then by half way through month 2 I was fine. I did read in the information and online that it can take up to 3 months for the hormone balance and the side affects to disappear with the pill and thus all the variety of symptoms - there was no way I could have put up with 3 months of feeling like I had morning sickness and not being pregnant but did hold out for 5 weeks and now there is no issues.