It
can, if it makes you ovulate later in
your cycle. Basically, your period will almost always come about 12-16 days after ovulation. Provera is usually used to start a period in a non-ovulatory cycle. Clomid will help you ovulate, and therefore, if not pregnant, give you your period about 2 weeks after ovulation. So in your situation, there could be two reasons...
1.