Question: In the last couple of months, I have experienced a chronic headache in my forehead and after checking with doctors etc nothing could be found. I then kind of had the intuition it could be related to my meditation practice. It's more the 2 years I meditate daily for 20/30 minutes or more. I have come around some articles online reading that focusing on the breath (especially in the nostrils, which I used to do) could lead to an accumulation of energy around the third eye chakra, and it seemed to me my pain felt exactly like this. I have now taken a break from my daily practice and the headache got much better and nearly disappeared, but as I stopped meditating I really miss the peaceful state of mind and presence I had when I meditated daily, so I would like to start again soon. I would be so grateful to get tips from you on this.

Answer: 
The Buddha did not teach to observe breathing at the nose tip. The Buddha taught to simply let go and give up craving. Just sit quietly and naturally. The mind should be "open" rather than "focused".
Try a meditation practice like ‘*Loving kindness meditation.*’ Here, you first direct loving-kindness to yourself and gradually extend to people you know and even to enemies (if you have any) at the end (you should be able to find more info regarding this meditation on the web). 
Another thing to try is to simply observe your thoughts – how they come and go. Then, “I miss the peaceful states” becomes merely another arising and ceasing thought. This meditation would also lead you to peace.