Spillin the beans?!

Ok so I'm 6w3d and only family and close friends know we are expecting. On Monday I had my first u/s but no heartbeat yet... Makes me super nervous so we are planning on keeping it to ourselves until my next weeks appt in hopes of hearing the heartbeat. Anyways, I bowl on a league and I was flat out asked if I was pregnant... How do you respond if you're not ready to announce yet? I bowl with these ladies so I felt like I couldn't lie to them!