Mat leave on fixed term contract (teacher)

[SWJ90]

I'm currently working a maternity cover at a school, my position is due to end in July. However, another member of staff will start their mat leave in September 2024, so they'd like me to continue working at the school.
They won't give me a permanent position so it'll be another fixed term contract. for 1 year until July 2025

I'm hoping to start trying soon and i'm trying to figure out my best options.
If I were to get pregnant October/November 2024, I'd still be under contract with the school when I started my mat leave, but if I left it until January, i'd be finished my post by then and so I'm not sure whether it would be unwise for me to continue. Also might not happen straight away, so I don't want to keep waiting either.

The alternative is to find a new school, but then I'd have to wait X amount of time (3 months?) to qualify for statutory pay.

I actually want to leave teaching but not sure this would be the best time to do it.

I am in a similar position in that I am a teacher, my contract ends August this year and I am currently 28 weeks pregnant. I am entitled to statutory maternity pay (not occupational).

Statutory pay is calculated on this:
Employees must:

be on your payroll in the ‘qualifying week’ - the 15th week before the expected week of childbirth
give you the correct notice
give you proof they’re pregnant
have been continuously employed by you for at least 26 weeks up to any day in the qualifying week
earn at least £123 a week (gross) in an 8-week ‘relevant period’
(Taken from the gov website)