Penny like Tawi2 said dont worry you will come across these challanges as you know during life and you still passed although not the aimed for target.
Your Husband po Im sure understands more of the background better than we do so I would go with his advice.
Whatever you do dont give up keep going as once you have passed the course as you will do then its onwards and upwards
If you feel angry try to vent it outside of the class in some way. Anger and going over and over thinks can distract the mind passing the course is far more important as you have worked so hard.
Good luck and look forward to hearing how you have passed all units

