If the bleeding already continues for 2 days please visit your gynecologist on the matter.
Have not heard of a procedure to increase the size of the vagina, you need to speak to your doctor about this also, in theory something like vaginoplasty can be done, however I cant tell you for sure.
I have herd of such things as restricting anchors(maybe they are called some over way) which are put on the penis and partial penetration then may occur. Also it will be good to go really slow and use lots of lube during intercourse.
Regards, John.
There is no such thing as too big for oral stimulation! While you may not be able to deep throat him or anything of the sort, you can still please him with whatever oral stimulation you are comfortable with.
Plenty or foreplay to ensure that you are very aroused and very wet could be helpful. Have him use his fingers to turn you on, or him to perform oral; I'm sure will have you very wet and aroused. I also have a very large sized boyfriend, about 10 inches. Sex can sometimes be painful, but the more often you have sex, the more you will get used to it, or be "broken in." Lol.
If you had never had sex before, that could explain the bleeding, or it could just be an irregular period.