You can get a reasonable meter and strips fairly cheaply at wallmart, if you are in the states. If you are at risk, better to have your own meter and check regularly.
I don't have a metre, my doctor is of the opinion that I do not need one - yet!
My mother had a problem with her metre and it wasn't the strips. The company sent her an envelope to send the metre back and issued her with a new one. But as diabetes86 writes it is best to check the strip batch.
My husband has a metre and he had a problem that was to do with the strips.
When you switch to new strips, its best to calibrate. This means you use 2 - 3 strips from the old and 2 - 3 strips from the new and compare numbers.
It'll give you an idea if the new box is off -- assuming you've calibrated old strips.
The way to calibrate old strips is when you get a test done at a lab, take a reading. If the numbers are very close, then you have a good meter and good strips.
It could also be the test strips try a new batch (the side of the strip container has batch numbers)
Yes, it does appear that there is a fault with your monitor.
You should have an information label that came with your monitor. Read this and contact the company. They are likely to send you an envelope for you to send your old machine back to them and will send you a new one.
There may be fault with the machine and the other problem may be batteries running low, but the machine normally gives a warning that the batteries would need to get changed.
If you do not have the information leaflet or cannot find it, look on the website for the company and how to contact them.
Alternately, if you purchased it from a pharmacy, take it back to them and they should give you a replacement.
Contact the company.