I took took that antibiotic and if I did not eat before or right after I took it I felt nauseaous. About the bloating I'd call dr and ask them.
I felt bloated during my IVF, but not nauseous. Did you check if these are listed as side effects on any of the meds? Either way, if you're worried about it, just call your RE's office. They'll let you know what's normal and what's not.
By the way, if you continue to get more bloated as you take more of the follistim, make sure your doctor check you for hyperstimulation. He or she might cut down on your dose to avoid this.
Best of luck with everything!