AKamm,
Sadly, the popularity of CSI has made life for the would be forensic scientist rather difficult. As you rightly point out, jobs in this area are hard to come by and the competition is fierce. Despite this, I would nevertheless state that forensic science it is an extremely worthwhile career and a rather interesting one - so stick with it if that's what you're looking for - but please make sure you truly understand what forensic science is really about and what forensic scientists actually do on a day to day basis.
I think I probably ought to point out that I am a 'Limey', so my views may be coloured by the UK context, but back in my day, there were no such things as forensic science degrees. Most forensic scientists would have a BSc/MSc in Chemistry, or perhaps in molecular biology depending on their area of work. Until recently, most forensic providers in the UK were rightly sceptical of the new forensic science degrees that began popping up and were concerned that they were a bit lightweight, but this seems to have changed. Forensic Science degrees are taken a lot more seriously nowadays and those accredited by the FSSoc would meet the entry requirements for most forensic science positions.
From what you say in your e-mail this change doesn't appear to have taken place in the US where sites expect a "degree in Biology, Chemistry or physical sciences", so I think your choice of a Chemistry Undergraduate course would seem sensible and offers you a greater flexibility in discipline (i.e. you should have the knowledge base to work in most areas) and offers you the best options should you change your mind.
You might like to clarify what is meant by physical sciences - Certainly in the UK, forensic science falls under the physical sciences 'umbrella', so a forensic science degree may well be acceptable and may in some cases be preferable.
If you have any specific questions on forensic science, or forensic science degrees, feel free to ask...
R