The Question and Answer section for Shakespeare’s Sonnets is a great resource to ask questions, find answers, and discuss the novel.
I think the third quatrain addresses the problem posed by the speaker in the first quatrain. The third quatrain offers a solution to the speaker's problem: he remembers that someone somewhere really loves him and this love is enough to bring him...
I think your best course of action would be to find examples of poems and sonnets in iambic pentameter. Sorry, forum space is meant for short answers only.
I'm going to need you to rewrite your question. I do not understand what you're asking the way it is written now. Thank you!