I haven't come on my period for 3weeks now and I'm always regular. Also I've been putting on weight like its nothing! I'm eating like I always do maybe even less but its just like I can't lose it.. what could this be because it's doing my head in, can anyone help me??

Well, let me ask the obvious. Are you sexually active?

Yes! But I take the pill

Yes but I take the pill...

Nothing is 100% effective. Go to a Pharmacy and ask the Pharmacist to recommend a home pregnancy test.

Ok I will do, but could it be anything else?

It could be hormones shifting, weather changes, your stress level rising.