Anyone else have vitex fail?

S.A.M ā€¢ Mommy to twin girls!!! šŸŽ€šŸŽ€
Anyone else have an irregular period and tried vitex and it didn't work?! I hear so many vitex success stories but it's not working for me!!! On CD 49 tomorrow and been on vitex for 7 weeks šŸ˜©. I thought it was working because after 5 days on it it gave me a period after going over three months without. Should I keep going with it or give up?!Ā