Tamoxifen and Vitamin E

Hi, I have just started on Tamoxifen but I am somewhat confused re Vitamin E in supplement form. I have read conflicting reports about this. My vitamin B supplement and omega 7 supplement both have small amounts of vitamin E in them - is it still ok to use . I find the omega 7 fantastic for dryness etc and the vit B supplement helps my concentration so don’t really want to stop them. Thanks for any info. victorsj