I put the sunburned feeling down to stretching skin, it couldn't possibly be bruising for me because the whole top half of my tummy is like that!

But I do have some tender spots, around my ribs and well, just in random spots actually, that are definitely more tender than others when they get a whallop.
I just put it down to my violent baby, as opposed to a big baby (thinking positive here )

Sometimes a dr will induce if they think a baby is getting too big, but considering inductions can be pretty intense experiences, I'm happy to leave it a bit longer.
Actually, that just applies to the birth in general for me

See how you go I reckon, probably your midwife/dr will be more inclined to intervene if the pain gets really really bad, but if you're just uncomfortable or in mild pain (though DH would get punched if he used the terms 'just' or 'mild'), it might be better just to suck it up..
I guess have a chat to your midwife and see what she thinks.
All the best!