Small fundal height advice?

Naree
After some advice from you ladies that may have experienced the same thing. At my 32 week appointment my fundal height was 30 cm. 35 week app was 32 cm and today at 37 weeks I measured at 32 cm still I'm booked in for a scan tomorrow morning. My OB said he might be a small baby or he could be growing fine? I don't exactly understand it all and what will happen after my scan! What are the chances of him being just fine? If he's too small what will they do?