So confused

Michelle
So we have been ttc since my 2nd Mc in July. My period was suppose to start yesterday (Friday), it didn't come. Glow moved my period to tomorrow (Sunday). A couple hours ago I started getting a really sharp pain on my left side towards my back. I don't want to test until tomorrow morning, has anything like this happen to anyone else? I have never had this kind of pain and idk if it's from ttc/pregnancy or what but it hurts 😞