Returns of Menstural Cycles

[Rupali]

Hi all,
I am 30 years old. Was diagnosed 11/04 with STage 3A BC. Her2+++, weekly ER+ PR +. Had a 9cm tumor . Mastectomy done in 12/05 and then 11/22 nodes positive.
Had 4 rounds of AC and 4 Taxol dose dense, 33 Rads, started Herceptin 05/2005. Have been on Herceptin since.
Started Tamoxifen in 06/2005.
Started Vitamin E 10/2005 together with some other supplements.
Today I got some staining and had some pains like periods yesterday. I will like to know did someone else who was premenopausal get periods back and what cold be the implication of this.

Please respond

Regards,
Rupali