If you are also one of them who lost their tweets if yes then you don't need to worry because you can easily search old tweets. steps of getting back your old tweets by using the Twitter advanced search:
The first login your Twitter account
Go to twitter's advanced search page
Under the “People” subheading
Enter your username (with no “@”) into the “From these accounts” field
Under “Dates,” select start and end dates for your search
Click on search and Twitter should return to top tweets from the period
Click on the latest tab
then sent between the from and until dates you select
If you don't remember the sent tweets If you remember something about the content then try to find it with the exact phrase.
read more: https://ityug247.hpage.com/how-to-search-old-tweets