Bump popped out at the side??

So I woke up this morning with a huge lump on my left side, it was absolutely solid. I'm on 13weeks so no real bump to notice. I never had this in my first pregnancy and I didn't until at least 24-26 weeks. It went as soon as I got up, it was very achey. If I push lightly where it was it almost feels bruised. If anybody's had this it would great to see what you think ☺️