Is it unusual that i couldnt get my penis in? -

I couldnt get my penis into my girlfriends vagina. She tried sitting and lying down, still couldnt get it in. Is it because im too big or is she too tight?

She s too tight--or you were doing it in the wrong place, which might be the case if you re both virgins. But if she s too tight, then it s likely vaginismus, and she needs to do something about that, or else you should do a lot more foreplay to relax her more.

could be both.. If shes too tight.. try this.. take some lube.. rub on yourself and on and in her... with her laying on her back.. hold your penis and direct into her vagina... do this very slow in a humping motion.. not to force it in too fast... this will definitely work.. just keep doing the humping motion while holding your penis directed and soon you ll get in.. she may be a virgin or may not have had sex.. if this doesn t work.. try going in soft... or half soft... right before your fully hard slip your penis inside and do the humping motion so your already in when you hard... good luck.