See this can be because of many reasons like one reason u gave urself. Insomnia. Other reasons can be hypothyroidism or anaemia or high BP or
sugar problem or simple reasons like having gastric problem because of not eating on time or having dinner very late. So I need details of ur case. Follow this
1. Don't take tea empty stomach. Eat something like a banana (if you are not diabetic). ) or any seasonal fruit or soaked almonds and a glass of water first thing in the morning (within 10 mins of waking up). No only biscuits or rusk will not do.
2. Don't Overeat
3. Take your breakfast every day. Don't skip it. U should eat whatever ur mother or grandparent eat in bfast. I mean to say whatever is ur traditional food. If punjabi eat paratha, if belongs to south then take idli/ dosa etc.
4. Have light meals every 2 hours (in addition to your breakfast, lunch n dinner) e.g. Nariyal paani, chaach, a handful of dry fruits, a handful of peanuts, any fresh n seasonal fruit, a cup of curd/milk etc
5. Finish your dinner at least 2 hours before going to sleep.
6. Maintain active life style
7. Avoid fast foods, spicy n fried foods, Carbonated beverages
8. Take a lot of green vegetables n fruit.
9. Drink lot of water.
10. Everyday preferably sleep on same time
Exercise in the form of yoga, cycling, Swimming, gym etc.
For more details, you can consult me