A good way to test is to stretch it between two fingers (sounds disgusting I know..). If it is your fertile mucus it should stretch quite a ways. Sure sounds like that is what it is though...happy bd'ing and good luck!!!
Oh, and no worries here about tmi or embarrassing questions...you should read some of the things I have asked/posted about..lol.
definitely sounds like pretty classic egg white cervical mucus (i.e. fertile mucus)!
Are you due for your period? If not, it sounds to me like fertile or EWCM (egg white cervical mucus). Most likely mixed with semen - that would explain the large amount.