33 weeks ibs sufferer

So usually when I'm
Not pregnant I suffer with ibs... It always seems to go away when I'm
Pregnant... Until
Now, ive been getting burning and loose stools since around last week, I obviously can't take anything for it... Is there anyone else out there whose had/having the same? 
It stopped with my last pregnancy and didng return again until
My son was around 1.5/2 years old 
:( xx