Now, the main question would be: how do i get my DGB safe from my coinomi wallet?
If your entire DGB transaction history is visible on the desktop version of Coinomi have you tried to send them to a different wallet or exchange? Once you have generated a new seed, create fresh accounts and move your assets there. This time keep the seed offline.
You should follow HCP's advice. You have now connected a seed that should never go online with two different software wallets. The seed is no longer protected by your hardware wallet.