First Timer- Is this normal?

Angela

This is my first pregnancy, been trying for about 8 months now. First day of my last period was 10/31 and got my positive on Thanksgiving, so Glow says I am 4w 2d. The past two days I’ve had very dull constant strange feeling in my abdomen. Almost like a stretching sensation, but occasionally it feels like very mild cramps. Also my sciatic nerve is killing me. No spotting or any other symptoms. I’m freaking out, is this normal?