Hi stacey, and welcome to the boards! We are all here for you, and I know many of us have been in your shoes many times. I too have IBS, but only the D kind not C or D/C. It's a frustrating way to live having to worry if your bowels are going to act up and where the nearest bathroom is anytime you go somewhere.
Word of advice from someone who has suffered for years and tried different things - try not to let your bowels control your life. I know this is easier said than done. Try adding fiber supplements to your diet (I like the Metamucil wafers) and try to shoot for 20-35 grams per day. You may feel bloated and gassy at first, but your body WILL adjust - don't give up too soon. Take acidophilus capsules to equalize your gut flora too. If D is a problem, some people get relief by adding Caltrate+minerals to their diets (in the purple/white bottle, not pink/white) which can be constipating for some people. Try to avoid or at least cut down on fatty foods, chocolate, alcohol, and caffeine.
Find something that relaxes you - whether it's exercise, meditation, yoga, massages, whatever. Give yourself time to relax if at all possible, because stress only makes things worse - which I'm sure you already know. If anxiety becomes a real big issue, see your docor for medication. I know some on this board will not advocate anti-anxiety or anti-depressant medication and will have some good advice about more natural remedies. However, some on this site have had great success with a combination of medication and other dietary changes.
Remember we're here to let you vent because we understand your situation.
Good luck to you and keep us posted,