Ok maybe I am crazy

Amber • 28 yrs old-married for 8 years. Lovebug born 11/3/09 BFP after miscarriage and before AF. Due end of August
I am 5w1d today. I have had no bleeding or significant cramping. I have had one pregnancy and one child. If I don't feel awful- I worry something is wrong. Like I worry I'll just wake up and magically be not pregnant anymore and never bleed or anything. Why am I obsessive over something awful happening? Is this normal? When did you stop panicking? Could I wake up and just magically not be pregnant and not bleed or anything? I don't know why I am so worried this time around. ?