Bending and lifting in the 16th week of pregnancy, advice

Tree • 💙3-15-16❤3-22-18💙3-28-19
Hubby and I have been moving but I haven't lifted anything heavy. Bending over multiple times has the left part of my abdomen mildly cramping. It's done this before but then stopped awhile after relaxing. I'm not sure why but this has me worried a little. No bleeding though thank goodness..any advice?