Is cramping normal?

Rebecca

I had a chemical last month. It started with period cramps and turned into my period. I got a positive pregnancy test xmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> and I can't help being concerned because I am having cramping similar to my period. I pray this isn't another chemical as my period is due tomorrow. Is cramping normal this early?