I think we did it!!

I had an early miscarriage in September, got my first pd after 4weeks and began ttc right after, I tested tonight since my pd was due yesterday (reading so many stories I thought maybe id become irregular or that something cud be off and af would show) i had a strong feeling that I cud be pregnant due to all the symptoms i was having which were the same as my last 2... i tested tonight cus I cudnt wait till the morning and it was positive!! I also read somethjng about hcg levels cud still be in the body from mc? So now im scared double, is this a viable pregnancy?will this be a healthy one?!