Hi Christina,
this is a very touchy question 🙂 , and don’t forget, i’m not a native English speaker, so my answer may be a little “bumpy”.
For me,
Sensation implies our five senses. (Taste, Hearing, Sight, Smell, Touch). Sensations may create feelings.
A Feeling is felt, perceived with the body and in the body. It has a quality (good, bad, light, heavy, confortable, unconfortable, …)
I see an Emotion more as a psychological state. This psychological state may generate a feeling, or be generated by a feeling, and have an impact on our psyche and/or our body.
All this is reflection in progress..
Have a nice day !