Hi Neoma,
The Lord's supper is something to be done when christians are assembled together, not in isolation. Acts 2:42 and Acts 20:7 are just some examples demonstrating that.
The Lord is understanding of your circumstances and he knows your heart.
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Regarding feet washing, here is what the scripture says:
John 13:10
Jesus says to him, He that is washed all over needs not to wash save his feet, but is wholly clean; and ye are clean, but not all.
He that is washed all over is cleansed from sin once and for all by the death of Christ.
That being said, as we pass through this sinful world, we can get defiled along the way, our feet can get dirty. When the Lord was here, people wore sandals and your feet would get dusty and dirty from walking.
The washing of our feet therefore needs to be done continually.
John 10:14-15
If I therefore, the Lord and the Teacher, have washed your feet, ye also ought to wash one another's feet; for I have given you an example that, as I have done to you, ye should do also.
The Lord says wash one another's feet. As brothers and sisters, it is our loving duty to each other, that when we see a defilement, to wash it off by the word.
So practically, we have the Bible (the word of God) which we use to help bring our brother or sister to the knowledge of whatever it is that they are doing that is defiling them.
The way in which we show a brother or a sister their sin, is not in a harsh way, I'm sure the Lord washed his disciples feet gently and with love and it is in that manner, we also point fault out to a brother or a sister:
Galatians 6:1
Brothers and sisters, if someone is caught in a sin, you who live by the Spirit should restore that person gently.
When we go to break bread, we want to be breaking bread free of any defilement.
1 Cor 11:28
Everyone ought to examine themselves before they eat of the bread and drink from the cup.
Before breaking the bread, any sin we have should be confessed and repentented for.
So, washing one another's feet is an act of love but remember, we are washed all over once only, and that was done at Calvary.