Its good that you decided to get some help. However, for pregnancy to occur there must be sperm and egg meeting to cause fertilization. I have never heard of anyone getting pregnant from fingering so I do believe you are safe :-). Periods can be late for a number of reasons and you have highlighted that you have irregular periods so it might be that. Stressing yourself about it will also help to delay it.
Anna --
Thank you so much :) both for your positive comments. I am having my period now. I am so relived. I was under alot of stress. Once again thank you :)
You are not pregnant. You cannot get pregnant from your fiance putting his fingers inside of you without any semen on it. To accomplish that... he would have to ejaculate into and onto his hand and then put that inside you-- and even those cases are rare. The brown spotting is your period trying to start. Wait a few days and it should fully come. If it does not, you can take a pregnancy test just to put your mind at ease, but chances are, your stress got to you and delayed you period for an extended amount of time.
Your periods are just late. You can not get pregnant from fingering. Only if he puts a sperm inside you that might get pregnant. Also stress will get your periods late. Just calm down dont worry you are not pregnant :)