Hi,I would like to ask if anyone knows how I can find out if I'm having twins or not.like what are the signs.im 6 weeks pregnant but my tummy is getting big for only this early

Ultrasound would give you the best indication. Other means may cause a suspision, but a scan would be done anyway to confirm.

It could be bloating or even gas. An ultrasound would be the only way to confirm.

Two years ago or so my dr sent me in for an u/s due to the sound of the babies heart beat sounding too far away... come to find out I was having twins... The only way to be totally certain is to have a u/s done