Coming of zoladex

Does anyone have experience of coming off zoladex please?

i had a mastectomy and diep reconstruction in January 2016 and have had monthly zoladex and daily tamoxifen. Despite the hot flushes I’ve enjoyed not having periods. Today I was told two more injections then stop. I’m 45. Will my periods come back?  How long does it take?  Are there withdrawal symptoms?  Is the first period heavy?  What’s it like just on tamoxifen?