1. Stop watering and feeding the plant. Just stop.

2. When it dries out, water once lightly then get it out of that container into a bigger one. THose fert sticks have dissolved and now you need to add soil to dilute the crap. Try and gently pull the soil from the fert stick location if it wasnt near the stem. Use Schultz Rooting Hormone powder liberally around the are you remove the contaminated soil.

This should take about 2 weeks.

Your plant is too small to be getting nutes at this stage. Your tinkering with the nutes at such a small size is why people kill their plants. Its an herb / weed and it can grow on its own.

Your lighting isnt helping, the warm lights are almost totally useless.

They would do better under an 18/6 light schedule. I promise.

Get the lights closer to the top. You dont need sidelight at that size, you need more light at the top. Replace the warms.

It will grow nice tomatos.