I have had and still have the same sometimes. what I have found with my stomach point is that it is that of movement, a tenseness, stress that is kept within the body.
This I have found due to how I take on LIFE within breathing, am I breathing or dense up inside myself in anticipation of something bad, the worst happening. a Survival way of moving.
This survival way of movement can either be n relation to money/finances or if that is covered it can be in relation to ones personality and characters surviving (or both going hand in hand)
The point within the stomach is that of emotional clogging, a build up of being in a state of emotional movement - This is why we focus on the 4 count breathing, where we take the breath as all of existence in all the way down to our toes through the entire body and at the same time into the ground and then all the way back out, and so within that grounding any and all "stuck" energy within the earth and to then with the out breath release all the old and purifies.
I have supported myself through slowing down a lot with this stomach point and to see anc check where am I moving within emotion - the signs are - shallow breathing, tense stomach and tense body, the most harmful of times are that of when you have to be busy/working and do not notice this at all, I have found during my sales as a salesmen, I would be in this state almost all the time, being tense and in a certain character/personality for the customers/business = survival mode - So I had to realize that I must breathe regardless, no matter where or what I am doing, even when I am moving fast and even when I must play a certain character for work.
So for at home practice, what I did was - I would take 5 min in the morning and sit outside and within that set the breathing and the feel within my body for the day, where I would focus on my breathing and Open up all the clogged energy and releasing the stuck emotions in the stomach and I would support and assist myself by massaging my solar plexus as that's where the Fear is stuck/manifested/crystallized, the main emotion that drives all the other emotions, and the stomach becomes like a storage place.
I might also not identify exactly what the emotions or fears are as they have been there for so long, but as I breathe I can see through my body and how the emotion has effected it what I must change as a current correction.
Let me know if this helped.