"A lot of times I will come up with a verse or two and thats it. must be writers block."
In the greater scheme of things, the story from the first two verses must be continued in the third and subsequent verses. There could be a bridge between verses 2 and three that acts as an "offset" to the story and then of course the "chorus" which would be the accent to the story. If you have a title or hook line, write a story around that.
I don't consider writers block. Thats just a label for being stumped for a few minutes. Take those two verses, put them away and in a few weeks pull them out and see if something has changed with your "stumped stage". Or, those two verses will have a new meaning and require a word change or two that opens up an entirely new avenue to follow. In the meantime, while you're waiting for those two verses to cure out, write two more verses and two more and two more ..... et. al. ad infinitum
Just don't subscribe to the "writers block" syndrome. That will surely stifle you! I can't tell you how many pieces of paper in notebooks and pads and text files on the computer that have pieces of songs. I have song pieces clear back to '98 on the computer. Every once in a while something matches up and all of a sudden there's that song I was looking for.
lc