there is no point taking a test yet, as i misscarried and it took about 6 weeks + for the pregnancy hormone to go from my body, i got positives then eventually it said neagtive, your period wont come till your back to your pre pregnancy level what i suggest is if you think you may be pregnant again go to your dr and get him/her to take blood see what your levels are then in a week or so aftewr again and see if they are going up if there are going up theres a chance you could be pregnant again if not, they should see if they are dropping, and if they are staying the same, they may re scan to see if you have anything left over from previous pregnancy that could be causing it all, how many weeks were you cos depending on how many weeks you where will depend how soon your cycles will get back to normal and also it has a part in when you should try again its took me just over 5 months to fall pregnant again.
Hope this helps
Firstly, I am sorry to hear of Your loss.
Each individual is different however if You are suspecting You are pregnant You should book in to see Your doctor and have a blood test done and find out where Your HCG levels are at.
As each person is different You need to discuss with Your doctor whether or not this is a current pregnancy if You test positive or whether it is left over hormones as some people can experience longer decreasing HCG levels
Goodluck