What are the complications of not getting my periods back naturally after stopping bc?

Not serious: The majority of women do menstruate spontaneously and regularly immediately after stopping bc. However, some women take 6 months after stopping the pill, and up to a year after stopping Depo-Provera provera (medroxyprogesterone). The biggest problem is trouble getting pregnant, but other problems could include: unexpected irregular bleeding, or hormonal symptoms, like acne and weight changes.