Ftm, 32+5 weird pressure?

Im 32+5 now and for the past couple nights when I gone to bed Ive had a weird, new pressure feeling. i circled where on the picture below, it's about where my waistband sits (its not from tight pants, as I was wearing clotges with an elastic waist).

Its not painful at all, it just feels like a weight on my hips. Its mostly when I lay down, but I've now felt it on and off during the day. Anyone know what it is? I plan to call the doctor if I feel any actual pain from it.