Hi Molly
Read the words near my signature...you have one life etc.
I believe half the battle in achieving any goal is setting it really...so write it down and place it where you can be remined that is the object of the game...
Break your path up into periods of time setting out what you need to do and by when...and most of all take time to imagine the realization of your dream...I can not offer a scientific basis for why such works but it does...at least for me...But be careful how you think ..it is critical to think good things because if I am right what you "see" is what comes to pass ..so do not focus on the negative only see the win.
Maths is not easy..accept that and be prepared to do what it takes if you want to make it.
I made the mistake of giving up on a caree in science... I was good at school topped the final year in combined chemistry and science ... near perfect mark but lost 1.5 marks for a simple miscalculation...could not get into Uni of NSW because of only doing combined maths but gave up and did law..a waste of life. I would sweat blood if I had my time over again even to only get to being a lab assistent.
You have to love your caree and live in hope that you can contribute to humanity... critical for self estmme.
Good luck call me when you get your degree.
alex

