Cramping

So I found out this week (officially today) that I am 4.5 weeks pregnant. Of course it is Saturday and I cannot reach my doctor to make an appt till Monday.

I've been having light on and off cramping (feels like my period is going to come). I am always a negative thinker and am just convinced this pregnancy won't stick. I've had no spotting.

Anyone else experience cramping early on and have a healthy baby?