yep!
I would say you have a light problem
long and skinny plant without branching
the plant needs strong light, I saw you’re using a 75W which is fine until the first leaves pop up, then you should use something more powerful
I have a 150W CFL which is great for the first 15 days, then it becomes useless (I use it for clones and germination) but then I switch to a 270W with 4 plants and that's a whole different story...
They told you that the pot is small, and they are partly right at this point (pre-flowering) the plant should be much bigger and it wouldn't fit in that pot anymore
Be careful, in the first photo I see the beginning of a calcium-magnesium deficiency...
Also, a little bit of food wouldn't hurt her