Praise be to Allaah.
If your husband went to the court or consulted a scholar whom
he trusts, and that scholar ruled that the threefold divorce counts as such,
then the matter is as he ruled, and you are not permissible for your
(ex-)husband.
But if he did not consult anyone or go to the court, then the
reliable ruling in our opinion is that divorce issued at the time of menses
does not count as such, either as one (talaaq) or more, and that the
threefold divorce -- if it is issued during the time of purity (i.e., when
the woman is not menstruating) is counted as one divorce. If you husband
follows this fatwa, or he himself consulted a scholar who says that it does
not count as a divorce, you are still married and no divorce has taken
place.
If he consulted a scholar who says that divorce issued at the
time of menses counts as such, but he regards the threefold divorce as one,
then you have been divorced once (one talaaq) and he may take you back so
long as the ‘iddah has not ended.
See the answers to questions no.
72417,
36580,
147987 and
96194 for the scholarly fatwas
that we have referred to.
And Allah knows best.