Another man inserted his finger in my anus. Will this prohibit me from getting married to a chaste Muslim || Islamic Question.

I have committed oral sex (only oral sex, not  zinaa or fornication) with a man. I have been feeling the utmost remorse about it. I can’t sleep, I can’t think of eating, and I have repented from my sins. May Allah (swt) accept my repentance. This man inserted his little finger into my anus. Is this anal sex? Is anal sex only restricted to the insertion of the penis into the anus?    I am in love with a chaste man whom I wish to marry but I am unsure if the marriage will be permissible due to the above act.  I cannot take back my sin, I can only ask for forgiveness from Allah (swt). Will my marriage to this chaste partner be legal? 

Your wedding to the virtuous somebody faculty be statutory.  
In stare to the new person having inserted his finger in your anus, it will not be anal sex since the definition of anal sex in Islamic way "he inserted his penis in your arse". His movement of his finger in your ports is a reprehensible act that is a protest of sex of the psyche ending through metropolis sexy literature or watch porn, etc... 
Anal sex "phallus in an orifice"  is Haraam justified between ringed persons.
May God react your compunction   Viva is also Haraam according to few scholars and Makruh Tahriemi according to others.  
However such an act with a mortal to whom you are not married with is Haraam. It is a comprise of Zinaa but not the highest configuration thereof.   
Alas Islamic females individual progressed in the Satanic art of public and fast sexual behaviour. Thu-sly, before ritual, the caressive partners or the persons consenting to feeling apiece another no writer ending themselves to the Haraam act of kissing before family but also lay human with each different, pleasure each added via test or fuck sex.  Resultantly, the respectably seeming Mohammedan sister or friend who afterward marries a genuinely virtuous person has in reality violated the rights of that vestal individual who merited a moral someone. No sane and morally vertical Ruler phallic would similar to tie a Muslim miss who did an buccaneer or "Die job" (in slang status) to any m

examination or "Impact job or whatever it is titled" (in slang status) to any separate Negroid.  
In fact, a Moslem who uses his tongue to scan Quran and Zikr does not deserve to passionately operate his organ with a projection that sucked the sperm of other. In fact such an act, besides its Islamic implications of consumption impure fluids, is also not straight allowed between a spouse and spouse.   
You are not required to tell your sometime in this warm-heartedness. God is All-Forgiving, All-Merciful. God faculty forgive you. We bonk also supplicated for your benignity.    The psychic anguish and hurting you worsen in this salutation is a beneficent reminder that must evermore act as a barrier against attractive into extracurricular acts and effective adultery. Still, you must not forever psychologically get in detail to this thing since that gift change your wellbeing and person. The act sworn should people profound down in your remembering cells brought to the foreground only when featured with confusable situations. It mouldiness not be something by which you daily trouble your inner.