can baby have a TT if it doesn't hurt to feed?

My baby has a poor latch. we use nipple shields as he comes off during feed and can't latch on again properly and sometimes bruises my areola.

Sometimes he'll do a quick 5 mins feed with no shield. other times he cries until I use the shield.

it hurt a bit once when he wasn't latched on well but not usually. I've never seen him stick his tongue out and I heard that TT is really common!

Just wondering if that's why he struggles to latch. he's also a small baby. he's 6 weeks old.

he's gaining weight fine and lots of nappies

can you ever see a TT?? I don't think there's anyone near to check