I understand your distressful situation. You may be suffering from depressive symptoms including irritability. However more clarity is needed regarding your problem. Information regarding your sleep, hunger, energy levels and concentration at whatever you do would be more helpful to decide on the severity of your condition. Your personality traits need to be evaluated in detail as well. Don't worry it is not your fault, it is the hormonal and chemical fluctuations in your brain which is taking a toll on your mental health. It is easily manageable with appropriate treatment, so that dysfunction due to the same can be reduced and your quality of life will improve. Some counselling sessions and if needed medical help might be useful for you. I would also be more than happy to help you with that if you are looking for online assistance. Discussions will be held confidential. You can directly consult with me through Practo as needed. Online chat consultation is available.

Please get evaluated by a psychiatrist. Affective instability ( mood fluctuations) could be a part of a number of different issues. It could also be sometimes because of physical issues like a thyroid dysfunction. Often a combination of medication and therapy with lifestyle changes like exercise , meditation will help deal with these issues.