Lipomas especially as you said you have multiple of them throughout your body, along the chest wall is also relatively very common.
Although they are most common in fat layer of the skin which is relatively uppermost plane of its occurance, and appears the be the case for you, lipomas can sometime also form in deeper planes of the body, other than the fat one.
If it might be one located deeper, you might be experiencing such symptoms, which again is uncommon as the heart is protected my many structures above it.
But otherwise if you are not experiencing any other striking symptoms like chest pain, irregular heart beat, difficulty breathing.
Any sudden new changes you have noticed in the lipoma.
Or any other symptoms other than mentioned, there is no need to worry.
Next Steps
For your sake and satisfaction, you can consult a general surgeon online or better in a hospital or clinic.