Not sure if your going to "see" any change in a few days. This seems to be the hardest part of growing peppers. I and others often worry about a pepper plants not looking perfect so we try and make it perfect by adding ferts, less light, more light, less water, more water, etc etc before the plant has time to adjust. I mean this is a growing plant and if you had too much light on it a few days later it's not going to double in size or magically look perfect again. You have to be patient and give it time to grow. I personally don't give any of my plants ferts until they are potted up and at least 6-8 weeks old. You may end up killing the plant altogether because of a slight leaf curl trying to do to much. Just hold back and let it grow.
Last year I used to baby my plants watering every week, giving them ferts every other week and they looked crappy and always had problems. It wasn't until I got to busy to baby them is when they really took off. I didn't have time to water them so they got a little wilted, but as a result grow longer, deeper, roots, I didn't have time to give them ferts, but I didn't realize they already had more then enough from the previous feedings. Basically peppers thrive with little or not effort so just let them grow and if you make a change or adjustment give it a few weeks before you do anything else.