The enemy will always exploit our weaknesses, whatever they may be. If you are afraid that your loved ones may be under attack, you must certainly protect them, but they do not need daily protection. It is enough to do so from time to time, regularly but without exaggeration.
To prevent the enemy from making you feel this way, cleanse yourself, protect yourself, protect your loved ones, and then do what you enjoy most: listen to music, read a book, or exercise outdoors.
Negative vibrations are the most insidious. They creep into our minds very easily, and by focusing on them, we only feed them. The real exercise is to try in every way to feed ourselves with positive energies, which are more difficult to achieve but certainly stronger once we understand that negativity is only a state of surrender.
You will see that as you move forward, you will be able to understand when your loved ones need protection and when it is just an attack by the enemy who wants to distract you from your meditation.
As suggested by Ancient Oracle, add yoga and pranayama so that you don't feel too tired and can keep your energy levels high.