Your energy work can effect your surroundings, including the animals there, or an increase in how many different animals, insects, etc., show up in your space(yard). It is a sign of healthy energy in a place.
You have a choice of how to use your energy. Focusing it on how to repel insects is diverting you from greater possibilities. You are here for a reason, and the clock is ticking. I use repellent, and work on other things. BTW, they aren't attacking, just staying true to their nature. Teaching you!