It is unlawful for an employer to interfere with an employees rights under the FMLA. However, there have been recent seminars focusing on how Employers may deal with the employee who is allegedly "misusing" the FMLA. Based on the information you provided, another issue you need to consider is whether there is or will be any discrimination based on a perceived disability. Sometimes, it is helpful to explain ALL facts to an attorney, and see whether it is appropriate to "push back". Based on the information you provided, it does not sound like you are "abusing" the FMLA protections. It may also be desired to have another discussion with your physician, who may be willing to fill out another certification. (Please understand that this is intended as answering a general question. Not all facts are know, and I am not intending to create an attorney-client relationship by answering your general question).