Anomaly on returning to USA

Hi All,

My H1B visa for 2014 is approved. My F1 visa stamping is valid till july 2015 and my OPTX is still valid till Feb 2015. If I leave USA for stamping in october this year and if stamping is not approved. Can I still return to US based on my OPT and F1 visa validity if I have the employer letter? As my H1B is approved and eventhough I didn’t get stamping, can I still be able to work on my H1B status here?

Please do advise me.

Thank you.