Lifting things during pregnancy advice please!?

I am 21 weeks roughly and there was a free couch right down the road maybe a block, and my husband wanted it, I know I'm not supposed to lift anything heavy and so I told him that we could go look at it and I could attempt it and if I felt like I would be uncomfortable lifting it that I wouldn't do it so we went down there and the couch wasn't heavy really at all, it had some weight obviously cuz its a couch but it was fairly light for being a couch, so I lifted it and carried it back to my house using my arms and legs more than my tummy and back but being since I haven't done really ANY lifting during pregnancy and just been taking it easy it made me a little nervous, I didn't feel any pain or discomfort and my baby girl is still twitching around in there do you think I'm okay? The only reason I lifted it was because we really needed a couch and it was free so we didn't want someone else to get it first, I don't feel like I did to much and by the flutters and kicks it feels like my little girl is fine, do I have anything major to worry about?