Yes you do stand a chance!
I reckon your predicted grades would meet the minimum requirements at quite a lot of unis. Just try your best and push the chemistry to at least a B (or A if it is required at some unis). Other than that you are doing quite well. The predicted grades will be sent to the unis which is also a plus side and since your GCSE's are BRILLIANT you don't have to worry about them at all. Oh yeah, don't forget work experience is REALLY REALLY important, even if it for a short length of time the unis are bound to look at it first on your personal statement. I would suggest trying to get a place at a nearby nursing home to help increase your chances of getting a place.