NO - one is not entitled to a certain number of micro-entity filings.
The section of the form one must sign -
1.27. (2) APPLICATION FILING LIMIT – Neither the applicant nor the inventor nor a joint inventor has been named as the inventor or a
joint inventor on more than four previously filed U.S. patent
applications, excluding provisional applications and ...
Congratulations - You will find that there are rules in many places, like the EPO, that require you to use a qualified agent to pursue it unless you are a resident. This will be the case in most places, but not in the U.S.
From the EPO
The PCT explicitly allows the receiving Office to apply its national law to the extent that it requires an applicant to be ...