From a point in time can mean starting before that point or starting after that point, and the context will generally make it clear which. So in your example the listener will interpret from as meaning before. But in the following example, the future tense tells the listener to interpret from as meaning after:
- Three weeks from today I'll be living in Berlin.
If you think your statement may be ambiguous, then it's best to use before or after. For example:
- The fire alarm started ringing ten minutes from the end of the match
is ambiguous, although most people would probably interpret it as before.