FLR(M) renewal: Lacking correspondence for a period

[Chongyla]

Date of first FLR(M): 13/05/2017 (I initially went from T5 visa to FLR(M) visa, renewing this November 2019)

Date of joint tenancy: 29/01/2018-present

Missing correspondence: May 2017 to January 2018

There's plenty of correspondence in my husband's name for our address during that period but nothing in mine. All I have with my name on it is an accommodation assessment from xxxx dated 07/05/2017 stating that I lived there.
We don't have anything for 13/05/2017 - 28/01/2018 in my name or both our names.

I'm really stuck as to what to do about this gap.

[CR001]

Any NHS, hmrc, national insurance et letters? Any other bills or TV licence etc??

Do you have anything in your name only?