I don't know your financial situation. However, if I were in your shoes I would continue to work and be business as usual. Obviously refuse to let any one stick you with a needle. Keep working there and be polite as you can possibly be and just decline.

Literally just say "no thank you" when the time is right. You don't need to lash out, it will only make you look like the 'bad guy' in their minds.

If/when you do get let go, make sure they have in writing the precise reason as detailed as possible why they let you go. Also keep track of the time-line now while you are there. Document any interactions video/audio or just on paper in a notebook regarding the subject and anything that has suddenly changed after you have said you would decline a vaccine. (ie how you are treated, work load, etc)

Make sure you aren't illegally recording any one - don't want to violate state laws or company rules. Once you telegraph your intentions they will find any little thing to get rid of you.

Good luck, stand up tall and straight, smile and be polite, keep a good head on your shoulders.