No symtoms

Ann
I had a chemical pregnancy last month and lost it while i am 5W 1 day. 
I am pregnant again now 4w 6D. initial 3 days had sore breasts, backpain and headache but my symtoms of pregnancy are decreasing day by day. I dont have any symtoms yesterday and today. I am afraid if i am loosing this one too. Since my 5th week is about to start i am so afraid if the same is going to repeat this time :( . why is my symtoms going down? My hcg levels were 282 on 4w1d and 745 on 4w3d... 
Prayers and advices appreciated.