So I am about 5 1/2 weeks into flower in a 3 gallon pot the plant has been in there a long time though and it is pretty sturdy. I am thinking about transplanting it into a 5 gallon what do you think?
If you went this far without transplanting I would just leave it as is. Unless you're plant is going to die if you don't transplant it, it's not worth it. Trasplanting Puts a TON of stress on a plant.