Look into short-term disability state law.
If it is within your same company, but another department, wouldn't your tenure with the company still apply? Ask HR
Is the 180 days the company policy or state? If it’s company, it might be worth it to ask if they would wave it.
Can you negotiate mat leave as part of your sign on? Are they willing to hold your position open until you've had mat leave etc. Explore those options first. Ultimately only you understand your financial situation - if this career will set you up for life etc etc I'd struggle to have no paid time off but if it was worth it in the long run I'd make it work
This one is a tough-y. I actually paused pursuing moving to another department or organization when I found out I was pregnant because of the same reason. I have turned down job requests (by no mean an actual offer) because I want my 3 months. However, think about how much vacation days can you accumulate until your birth? Sick days? Can your family afford 1 month of no pay for you? Can you work from home for a month? If this all you have wanted professionally, I think it may be worth pursuing it.