Hi and thanks for the query,
as you rightly put it, it is very unlikely that it should be a pregnancy
. The chances are low but nor impossible however. Missed periods in young females of reproductive age is not a rare phenomenon. But I suggest you get a pregnancy test done. I do not think that the migraine
medication has actually interfered in anything, considering the fact its never really done so i the past. Exclude a pregnancy and regularize more your birth control medication.
Thanks and best regards,