is is normal to feel a lump on abdomen?

Yes most likely that is your port. Check with the dr the next time you see him to be sure.

I've never felt it before. is that due to weight loss?

Everyone is different... But most people feel it more when they start losing weight. It's really depends where it is...and how much belly fat you had.

it's a few inches away from my incision.. i have a lot of belly fat lol could b why I haven't felt it.. calling my doctor just to be on the safe side.

I'd say its your port if you've lost a lot of belly fat. I can now feel mine so easily now that my tummy is much much smaller. Everytime I feel it makes me smile. Only another banded person can understand that comment.