what symptoms should i expect when my girlfriends a month late on her period?

well tiredness will be seen fever mood swings but there are no 100% that she will have these each woman is different .. but in my experiences it was the feel of getting my period but it never showed all the signs were there but not blood  .. also the left side of my abdominal was very sore  from time to time almost like a stitch  i later found out it was my parts widening and stretching making room 

Some women can have delayed periods up to a month long, yes it does happen. You might be unlucky if she's ovulated very early (Yes it can happen early) and an egg is present for the sperm to fertilize. There are so much symptoms, so may or may not be an accurate indication but may help a little.

- Sore, tender, enlarged breasts (Sometimes blue veins can be visible.)- Insomnia, cravings, or no appetite (It varies though, too much external causes can influence this)

Just to be sure, get some over the counter home pregnancy test then you'll know. Please do PM me what happens though and I hope you don't mind sharing with me how you guys will go over this.

hi kayden, is 1 pregnancy test enough to know about it?

Since its been a month late now, yes, it should be very accurate as the hCG hormones are abundant by now.
And just if your concerned, at this stage of 1 month now, it isn't necessary to use urine from the morning, but do it if you want a sense of security and reliability. If it came out positive then she is without a doubt pregnant. 1 should be enough, test again in a week if your unsure. Best of luck to you mate, hope she isn't pregnant as this will cause trauma and problems. And take it easy, just learn your lesson from this.