Had clear colonoscopy, 2 transvaginal sonograms with a cyst of 2 cm- told ibs- pain in lower left (constant ) intermitten on other. what test next?

None: They will monitor the cyst every 6 months; for ibs you can try different things: fiber(25-30grams), anti spasmodics, anti depressants, changing your diet. Diets low in gas forming veggies like beans and broccoli can help. I also think you should try eliminating gluten and dairy for 1 month to see if that helps; if not you can add them back in.

Regarding the: Cyst, no follow up is required if you are premenopausal. These are very common.