you should be able to feel it. If the earrings feel too heavy, chances are they're enlarging your earring hole, and when you take them out, you might see a little bit of sagging. Honestly, though, as a person who has been wearing earrings since she was 18 months old, it takes a lot of heavy earring-wearing to stretch out the hole. If I wear basic studs for a couple months and try and put in indian earrings (which are thicker, usually because they have a screw-back instead of the snapping ones you see normally), it'll be a struggle because the hole naturally closes up.
Also, I've had my earring hole stretched out (due to an unfortunate accident involving a basic stud catching on a badminton net as I ran under it), and within a couple months it was back to normal. I just took the earring out and let it heal - it was fine, didn't need re-piercing or anything, and now (8 years later) I can't even tell whether it was my left ear or right ear that was damaged- they both look the same. Your ears can handle the weight, don't worry!