I tried the Lacto 5 from guardian and they did nothing for me, 
but they were the ones of the shelf...

Go for probiotics that need refrigeration,  my local Farmasi has
probiotics for sale in a refridgerator in store...
the ones you can buy on the store shelf wont be much good...

It takes a long time to build up the good bacteria in the gut,  so you will have to take probiotics as well as fermented foods...

Btw fermented foods are probiotics too and they are very cheap to buy...

Good luck!

Quality of product depends on the manufacturer
Do some research to find a good probiotic brand...

Refridgerated = fresh
Shelf = freeze dried

You best option is to eat fermented foods like
Kimchi
Fermented cabbage
And any other traditional Malaysian fermented foods
Try to eat some of these foods with every meal for best results

Also pyslluum husk powder for extra fibre to help elimination of faeces ...

Do you know any refrigerated probiotics high in bifidus factor? Is Fybogel one of the pyslluum husk powder?

Just eat fruits, green vegetables, fish, rice and drink water or tea for the next few days and see if the symptoms go away. Fresh meat and root vegetables should also be ok.

Avoid grains with high protein and fibre. No floury things, oats and pysllium husks for the time being.

My friend who is possibly gluten intolerant or celiac noticed the breathlessness stopped almost immediately with the diet but the constipation took longer to go away. Lots of money spent on doctors but they could not find out what's wrong. So we did quite a bit of searching and reading online and we realised that the symptoms were possibly related to GI because we had been on a high-fibre diet of oats and cereals. I was ok but my friend has not fully recovered yet and is still looking for a doctor/hospital to go for tests.

Do you have Celiac disease? If yes, STOP taking cereal, bread, peanut butter as all of these may lead to constipation. STOP taking stuffs that contain gluten especially wheat, no bread, no cake, no cereal.

Eat unlimited amounts of vegetables and small to moderate amount of fruits. Cut out all the crap carb and replace with complex carb. Remember to drink at least 3L of water too. Eat small to moderate amount of meat too (fat is good for constipation too, lubricant for intestine)

I have constipation problem too. What I did was drink warm lemon juice water/plain water in the morning (Must be warm, not cold), DO NOT sip them, GULP the whole thing continuously. This can help the water to reach your intestine effectively. Changing your drinking habit can help too. Then, eat breakfast like normal. (Again, NO cereal crap, no bread crap). Then, continue to drink some water and go to the toilet. DO NOT sit, do SQUATTING. It is effective for me.

Change your diet, drink more water, warm water in the morning and you are good to go.