Help! 27 weeks pregnant and cramping?

Karla
Hi ladies, it's my first time posting on here and I had a question for y'all. I'm a second time momma and I became pregnant with my second baby when my daughter was only 4 months old. Last night and today I've been cramping pretty strongly as if they were menstrual cramps and I get a small burning sensation in my knees. I'm 27 weeks pregnant. Is this normal? Could it be that my body is still tired from having such a recent pregnancy? Have any of you experienced it around the same amount of weeks?
With my first, I started to cramp and feel super heavy towards the very end, so I'm worried about feeling these things now. They're not as severe, but I'm still scared. I'd love some advice to calm me down a little if y'all could help! Thanks for reading.
(: