Without pics, all you can hope for here is some fundamentals. Follow them and all will be well.

3 days is awfully early to panic.

Be cool, water with 6.8 pH water when almost dry and keep good lighting and air on the seedlings.

Thats really all you need to do
HARDDON Reviewed by HARDDON on . My little sprout! It sprouted out of the soil like 3 days ago! I've been looking at the pictures of peoples plants and theirs are a lot bigger than mine on day 3. It still looks like day 1 but a little tiny bit bigger. Whats the problem? Rating: 5