The more obvious questions are:
- How are you going in 2 unit Mathematics? If you are going really well then that is a better indication that you should continue with Extension 1 than one poor extension 1 result. If you are not doing that well in 2 unit mathematics, then maybe you should look at the options available.
- Do you find actual Extension 1 material (not 2 unit stuff done early) difficult and time consuming? If you find that 1 unit of Extension work is distracting you from your other 10 or so units of subjects, then you may need to revise your program.
- Coming first in extension 1 does not mean very much in a small group of 5. 44/72 again means very little without having seen the actual test. If it was an easy paper then the poor result should give you the kick up the pants you need. Again, it comes down more to how you are going in 2 unit, and whether the 1 unit of extension maths is a big distraction from your other subjects.
At this stage though, you have a heap of time up the sleeve so I'd bear with it. However, perhaps you need to review some of the topics you know you are struggling with. If you need any help, post back and I'll give you a few specific pointers that may help out.
Best Regards
OldMathsGuy