Pelvic area/hip joints popping???

Sara • Mommy to Ayden Alexander & expecting a princess in Dec. 2015!
How many of you mommies are expriencing popping or cracking of your pelvic area joints?
I started noticing it at about 10 weeks. I'm 18 now and it's like I'm more stiff. Every time I get up from the couch or bed I hear pops and cracks in my hips, lower back, butt, or just my entire inside pelvic area. 
Baby is fine and kicks several times a day. Just wondering if anyone else has this too and if I should be doing some sort of stretching everyday to help it?