I have ejaculated outside the vagina of my gf .. after ejaculation we ddnt do fingering and all .. is there any chance of pregnancy ?

Pre-Cum: Yes. of course. If you had an erect, uncovered penis inside of the vagina then you can cause pregnancy. Pre-cum, which is semen, leaks out of erect penises and is very well known to cause pregnancy. Pre-cum has the same concentration of sperm as does the ejaculate.

Yes: There is always a chance that some of the early ejaculate went into her vagina. Not a safe contraceptive method. Whenever in doubt, test.