Need some reassurance!

So I’m 30+4 with my second. Suffered from about 33 weeks onward with my first with SPD and was signed off work at 34 weeks. I work full time as a teacher (5-7 year olds). I’m now starting feel the pain and am struggling. It’s earlier than last time and it’s more wide spread into my hips etc.

With my first, I tried to push on but ended up off work and unable to drive or not do much for the last 8 weeks of my pregnancy (I went to 42 weeks). My aim was to get through January but my husband wants me to get signed off now. I was battling on but today I’m struggling so am now thinking he might be right. Problem is I feel like a complete wimp! I known it’s ridiculous but I we’ve had 2 others in work go off on maternity, both at around the 36 week mark. I feel like an idiot for not coping at 30-31!!