i made the mistake of transplanting my seedlings after they were a few days old and then again when they were maybe a week old. Ended up killing 3 and the others took a few days to reroot but they're doing better now. I think its best to either germiate the seed in the pot it'll stay in or wait until the plany is older to transplant. Seedlings dont seem to adjust well to transplanting. Give it a few more days it should get back on track.