Stunted seedling... Will it continue growing?

I have a seedling that sprouted last Saturday. Despite the fact that I thought I planted the root facing upwards, the plant sprouted at the edge of the pot. It hasn't really grown much at all for the past 4 days or so. I'm fairly positive that the cause of the stunting is the roots hitting the side of the pot and not having enough space to grow. Will it continue growing properly when I transplant to a larger pot today or tomorrow? Is it likely that the permanent damage be severe?

All help is much appreciated.

help it's my first groooow

pictues???what soil???

Sorry don't have anything to take and upload pictures with.. The leaves are slightly browned on the underside(this has never really worsened after it appeared) and one brown spot on the tip of one leaf there from sprout. The stem is reddish in color and the first set of leaves have still not fully opened/are partially closed. The second set are green and generally healthy looking, but are still small and haven't grown much as much as ones that sprouted a few days after them.

The soil is from my yard(forested area pretty close to delaware river, soil seems pretty fertile to my amateur analysis) mixed with organic tomato fertilizer. But I don't think the soil is my problem. I have 2 other seedlings that sprouted on Monday or Tuesday. One aurora indica and one jock horror(the stunted one is either of the two strains, I'm not sure which). Both are about an inch and a half above soil level in height(after reinforcing the base of the stem with some more soil). They had developed second set of leaves/first set of "real" leaves on the same day they sprouted. The color is spot on without any browing or yellowing, no drooping, and the plants are perky and look healthily developed. The jock looks like she'll be a nice, big lady one day. She's already dwarfing the aurora in comparison(1" from tip of leaf to the other).

I tried loosening up the soil on the one I'm having problems with just now. I noticed it felt a little dense/compacted(maybe this was depriving the roots of sufficient oxygen or they couldn't penetrate the soil due to this?), and the other pots weren't like that.

Other than that, though, I have basically taken the same care of all of them. The one I'm having issues with I also collected and mixed the soil at a different time(from same location), so perhaps that could be a factor as well. Looking back, I suppose the plant has experienced a significantly higher amount of trauma/situational stresses than the others because it was planted/sprouted first. Maybe it's just a combination of all of these factors? I'll just have to replant tomorrow and hope she improves some.

Forgot to mention, I keep them under a 20 watt CFL ~18 hours a day. Going to be planted in the ground once sufficiently matured.