How to tell your babies position!

So I went for a ultrasound at 34 weeks and baby was Breech he’s like straight across position. And I can’t tell what position he’s in. Like my two sides are really hard and I feel the movement by my ribs and upper belly so I feel like he’s still Breech so I’m a little worried I’ll need a c section. Has anyone else had this or know how to tell? I googled it but still cant tell