Hello.
Thank you for sharing your concern. It must be difficult for you without sleep. However, it is very important to understand the root cause for the lack of sleep. It may due to various reasons, since this is happening for the first time it could be due to a change or an event that occurred lately due to which you have undergone certain stress. Stress does play a role in the lack of sleep, however stress might not be just the only factor. If you feel it is stress or any other reason it is important to address and deal with the same.
Next Steps
If you think it is stress, it is important to talk about it and let it off your mind. To understand if it is stress focus on your feelings, try to understand how you were for the past 15days in regard to your mood and feelings. This may help you to understand the reason to a certain level. Talking to a counselor would definitely help you to understand your feelings better and also analyse the right reason for the lack of sleep.
Health Tips
Talking to a counselor would definitely help. Try to focus on your feelings, analyse if there is anxiety or any kind stress which is causing the same.