enfadarse y poder
I wonder whether anyone can help me understand the tenses used in the following expressions from my spanish book
1 In a bar a girl tells her friend not to be angry with her and says " No te enfades ahora, hombre"
I can't understand why she did not use the present indicative tense of the verb ""No te enfadas"
2 She also says to her friend later "Pero he pensado que nosotros dos podiamos usar esta informacion"
This is the first time that she has raised the subject and I cant understand why she used the imperfect tense of poder
instead of the conditional tense "podriamos".
Is it because she is refering to her thoughts in the past ?
And that if her thoughts were in the present she would have said "Pero pienso que nosotros dos podriamos usar esta