Correct use of 惹人心烦: is 然而我不要惹人心烦 a suitable way to say you don't want to be a pain in the neck?
Looks fine to me.  But you could say 不好意思麻烦你 = sorry for bothering you.  To me 麻烦你 sounds like a more colloquial way of talking about bothering someone or being a trouble for someone.