You poor girl. I’ll see what I can find out and what sources…in the meantime I’ll be praying for you.
Impediments to marriage e.g.
(d) spiritual relationship (cognatio spiritualis). Spiritual birth has been considered as producing a kind of relationship between those who took an active part in the rites of Christian initiation, baptism, and confirmation, and marriage between them is forbidden. The** impediment arising from these sacraments has been restricted by the Council of Trent** (Sess. XXIV, cap. ii, “De Ref. Matri.”); it prevents the marriage of the sponsor with the child or with the child’s parents, also the marriage of the minister of the sacrament with the person baptized or confirmed and with his parents. But we must remark that as far as the Sacrament of Confirmation is concerned there can be no question of the marriage of the minister; also as confirmation requires only one sponsor, who must be the same sex as the person confirmed, this impediment cannot arise between them; the only case therefore where it would occur is in a marriage of the sponsor in confirmation with the parent of the child, which would be null and void;
There seems to be an impediment but not specific to your situation as it isn’t considered a likelihood.
So I need to find whether dispensation…special permission… is possible.
It would seem that you can seek a dispensation judging from this passage
Marriage is juridically a contract, and a Christian marriage does not cease to be a contract because it is a sacrament. Being a sacrament it is a sacred thing, and as such is subject to the authority of the church; and, being a contract, the church can establish impediments to matrimony, either personal or formal. Having the power to establish them, she can abrogate them, modify them, and, consequently, dispense from them in individual cases (see MARRIAGE; DISPENSATION).