Tamoxifen side effects after stopping

Hi everyone, I'm new to this website & would like anyone's help!

I've been 9 years clear of Stage 3 Her2 BC, and have just ceased taking Tamoxifen a month ago, as approved by my Oncologist.  I did forget to ask him, if there were any side effects.

I have just started having knee joint aches and am wondering if this is a side effect of ceasing long term tamoxifen?  Or if anyone has experienced any other side effects?

Thanks & take care everyone!