I Had my Cast Removed 5 Days Ago and I Don't Like How my Nose Tip Look. Do You Think I Should Consider a Second Rhinoplasty?

It's too early to think judge your results and way too early to start thinking about a revision.  Once the cast is removed, the swelling actually may worse for another week before starting to resolve.  After 3-6 months you will have a better idea of what your nose's final appearance will be.  

It sounds as if you are very apprehensive looking at the immediate result. This is not uncommon at all. The tip, especially, can be swollen for months even up to one year following rhinoplasty. With regard to the nose not being straight, that is a more difficult issue to address. That can sometimes be an illusion created by swelling. However, if the bridge does not look totally straight I will usually advise patients to begin "nasal exercises" which is essentially using finger pressure to guide the nose to the midline. Regardless of how things look now you should return to your rhinoplasty expert and discuss your concerns. Further, most experienced surgeons will not consider revision for about one year to ensure you've healed completely and that the perceived issues with the result have had a chance to settle during the healing process. I hope this information is helpful.