Brief Answer:
IBS with fecal incontinence, needs management

Detailed Answer:
Thank you for asking!
If the workup for bowel was all clear then the odds for functional bowels like IBS are more likely. i would like you to seek a gastroenterologist for further work up as there are thousands of etiologies possible for it. washout techniques, radiography and breath tests., CT volumetry and some other GI functional assessment would make things clear for the aetiology.
. Intolerance to lactose, fructose and sorbitol are relatively common and thus lipids intake should be minimized to the minimum to avoid such bloating. Bifidobacteria and associated probiotics have proved useful and helpful in the bloating issues.
Another rare cause of bloating is abdominal anterior wall tone dysfunctions resulting in bloating.
Also prokinesis and peristalsis of GI tract once impaired may also cause the bloating.
Postprandial bloating is a hallmark of an inflammatory bowel disease and it needs to be assessed by a gastroenterologist and treated accordingly to permanently have a solution for it.
In nut shell, Diet and lifestyle modifications for the functional Gi troubles, More fibres, less fats and carbohydrates, small meals of frequent durations that few larger ones, use of healthy lifestyle and exercise, losing weight if an issue, controlling lipid profile in a limit and compliantly using hypertensive medicines and staying in touch with your doctor is advised.
Fiber supplementation improve symptoms of constipation and diarrhoea. Polycarbophil compounds (eg, Citrucel, FiberCon) may produce less flatulence than psyllium compounds (eg, Metamucil).

Judicious water intake is recommended and should be followed. Minimum of 2 litres in a day is advised.

Caffeine avoidance may limit anxiety and symptom exacerbation. Legume avoidance may decrease abdominal bloating. Lactose and/or fructose should be limited or avoided Take care to supplement calcium in patients limiting lactose intake.

Gluten intolerance has been further associated with irritable bowel syndrome. so try gluten free diet and see if it helps.
Meanwhile some pro kinetics like metoclopromide and domperidone and erythromycin would keep the propelling work and make the bloating less but it needs a work up as i mentioned to sort out the most likely functional cause as IBS etc.
And last but not the least of fecal incontinence might be associated with IBS or be a separate entity.
Seek a gastroenterologist for further management.
I hope it helps. Take good care of yourself and don't forget to close the discussion please.
Regards
S Khan

---