If we can get some pictures it is allot easier to identify the type of tree you have
This link will tell you how to post pictures on this forum,
From your description it sounds kinda like a flower from a Fukien Tea. This link shows some pictures of my Fukien Tea Bonsai.
There is a chance that it may be a serissa ( tree of a thousand stars ) here is a picture of my serissa. These flowers are really tiny and hard to take pictures of but look at the leafs of both the fukien tea and the serissa.
If neither one of these trees looks like yours don't worry. There are lots of flowering bonsai and with a picture we can help you figure out what kind of tree you have.
Hope this helps
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