Ah, OK, the Proxmark 3 Easy does not have the besterest antenna.
If not swelling, then likely coupling, you may have to just hold your tongue right until you learn the technique young grasshopper 
There are some tips and tricks to increase you chances for a successful read.
Use your xFD to visualize what you are trying to replicate
Place the antenna perpendicular to the implant
Use lf tune to find your greatest voltage drop
You may need to press firmly (don’t touch the antenna posts)
Hold still
lf search
If you get consecutive chipsets reads, try a read and write (remain still)
This may help also
Watch Amals proxmark video AND T5577 video to further help
Try out some of that, if if you are still stuck come back and ask and I’ll make up some more bullshit try and help you out