Thank you for the information. Although I don't see a question with each one of your numbered subparagraphs, I will address anything I see in them that might raise an issue. If you have some follow up questions after you receive my response, please feel free to ask them.
1. Although this is a statement on your part, I want to point out that unless there is a written term contract that locks in your hours, duties, etc, an employer is always free to change them. So, even though you have indicated that you will only take a long term position, that isn't binding on the employer no matter what they say now.
2. You have no legal duty to make your employer aware of your pregnancy. Obviously treating you more adversely simply because you are pregnant would be unlawful. However, keep in mind that on the flip side, unless you have a doctor certify that you are not healthy enough to work the hours you are asked to work, you are not entitled to any special treatment because of your pregnancy by way of reduced hours or duties.
3. If you are eligible for FMLA, then your employer must reinstate you to your previous job or one that is "nearly identical." You can see more information on this issue by going to the following link: https://www.dol.gov/whd/fmla/fmla-faqs.htm#11
The only exception would be that your employer could make a change in your job if they would have whether you were on family leave or not. In other words, if the employer is reorganizing or the job ended, then they would not have to reinstate. Likewise, an employer may terminate for "cause" that occurred prior to leave.
Please let me know if you need any clarification. If none is needed, then if you could take a moment to leave a positive rating in the box above, I will receive credit for assisting you today. Thank you