While I am sure your body sustained some changes with your pregnancy - You MUST be joking or exercising some poetic license in claiming that "my nose stretched clear across my face "...
Such a are achievement, achieved naturally, without the use of a grabbing and twisting tool, would even engender professional jealousy from a member of the Spanish Inquisition which was quite inventive at painfully changing human anatomy.
The skin of the nose is densely attached to the underlying frame of the nose and is hardly ever accompanied by a significant underlying fat deposit. Even in obese people, the nose does NOT reflect the surrounding fat enlargement. As a result, I have NEVER heard or see liposuction of the nose. The operation thankfully does not exist.
But - let us hypothetically say it DID exist - UNLESS you managed to store about a quart or so of fat in your nose (a physical impossibility which would have your nose resembling a baby elephant's trunk), you would not have sufficient fat for such an improbable operation.
Dr. P. Aldea