Loss of symptoms. Please reply?

Dr
So I started having SUPER early pregnancy symptoms (headaches, fatigue, slight nasuea mild cramping) and then six days after the possiable conception I had implantation bleeding. 
But yesterday & today I'm feeling a little better. More energy, no nasuea, no headache. No cramping.
The symptoms could be subjective. I'm not sure they were ever truly related to conceiving. 
But I was just wondering if anyone else has lost their symptoms in early pregnancy and not had it result in a miscarriage. Or even if it's possiable to temporarily lose your symptoms.
If I were further along I'd be more worried but for now I'm just confused. Lol