How to continue practice with pain? I practiced meditation for 6 months continuously. I used to meditate 45 mins in the morning as well as evening. In weekends, I used to meditate many rounds with breaks in between. I developed fear of loneliness due to which I have suffered from insomnia which has lasted till now though it has gotten a bit better now. I don't know if its dark night of the soul or depression. I have also been suffering from gastritis since 1 year. The stomach pain causes me anxiety and I have not been able to continue my meditation. I am waiting for both my sleep and stomach to get better so that I can continue. I sometimes feel that the problem will last till my death. I don't know how to progress from this phase. My meditation practice had definitely brought many positive changes. I have set milestones for myself regarding the practice that I think I may not reach during this lifetime. Any suggestions for me ?
You should not believe meditation is for everyone or should not believe you are a "failure" if meditation does not work out for you. In reality, serious meditation is only for a small minority of people. Some of the meditation in the Western world is just 'fondling' with a service that is advertised so some smooth talkers can make money. Few Westerners are doing actual real meditation.

Fear of loneliness ("dark night of the soul") is certainly a common and inevitable result of extensive and intensive meditation. This existential fear must be passed through to achieve any advanced level of meditation. 

Therefore, if meditation has not worked out for you, please do not judge yourself negatively. Many monks meditate for many years but make little progress and disrobe. 

You should see a doctor or healer for your gastritis and find some solutions for poor sleep, such as Chinese herbal medicine, exercise, swimming, metta meditation, spiritual friendship, etc.

If you believe in future lives, the Buddha taught lay people to practise generosity &amp; keep the five precepts is enough for 'rebirth' in heaven.  The Buddha generally did not teach meditation to lay people. 

The sense of "self" is a natural survival instinct. Meditation can diminish the sense of "self" and this is actually not healthy for most people. Its only a small minority of people who are able to abide without a sense of "self".