Regarding Stomach Issue. Only?

On 7th April I had semi solid semi digested motions. 2 days after I had loose stools in morning then cramp then again loose stools , bitter taste of mouth, burning sensation in stomach then nausea. That day went 2 times motions again next day I had little bit cramp and 2 times same semi solid and semi digested motions. again today morning loose stools then bitter taste of mouth whole day, after dinner again I had cramp and then loose stools and feeling very spicy while passing stool. Since one year I am having stomach issues Dr (Gastro) saying IBS in whinch I had infections many time, Current medication is Macrobonik 40mg, enzarforte and Velgut. My issue is that whether again I am having infection or it is due to some other issues like gas ? As it is not safe to visit Dr due to Corona, should I take Rifaxamin 400 for 5 days or should take after Dr consultation only? My Dr not available online. Pls help.