The following commandments have been breached.
1) You shall keep the Sabbath day holy.
2) You shall not commit adultery
3) You shall not desire your neighbour's wife
Ok...
Yes, you have answered your own question. These are sins of
grave matter, and since you fully consented to commiting them, then
they are mortally sinful.
I am not sure if you are sorry or not, but if you are, I'd advise
you to not receive Communion until you have made a private
confession (Sacrament of Reconcilliation) with your priest.
Receiving Communion in a state of mortal sin, is a mortal sin in
itself.
Well, since you have come here to consult us, the community, we
pray that you will return to the path of righteouness, and thus we
do not condemn you.
P.S I have a question to ask you. Why do you affix '(bread)' behind
Holy Communion? Perhaps you would like to share with us your
understanding of Holy Communion.