Stinging sensation at top of bump

Ho
Hi all,
So I've had a stinging pain at the top of my bump right under my boob for a few weeks now, it's progressively getting more sensitive. 
It feels like there should be a bruise where the stinging is but nothing.. No marks there and I mentioned it to my midwife 3 days ago and she said it's not a spot the baby is kicking as its too high.. It's just under the crease where my boob meets my bump. 
It seems to get worse as the day goes on and now at nighttime.  
I don't like to cause a fuss but am worried! Anyone experienced this pain before? All I can describe it as is burning sensation that hurts more when I touch it. 
Let me know what you think xx