You may want to call the person you did the loan with and ask them. I would bet that they told you 6 months to REFI so they could use a new appraisal or if it is an FHA loan, that is the length of time needed in order to do a Streamline refinance. Rates are very low, so my advice to you would be to get out of the ARM and into a FIXED mortgage.
Your loan will most likely convert to an adjustable rate, which will be determined by combining a fixed margin, plus an index (a variable that tracks an economic indicator). There are generally no loans that trigger a definite refinance after any time. You CAN refinance, but you're not forced to and there's no guarantee (usually) that you would qualify at that point.
The best thing to do is not panic. Review your loan documents either with your loan officer, or someone new who you feel can help. Get an understanding of your current loan first, then determine if it will suit your needs going forward. You may just find that you're OK with the terms you have and can reasonably foresee. If not, you can then also begin to research your options.
I am here in CA as well and would be happy to help. There is no cost or obligation to inquire further. I help clients convert from adjustable rate loans all the time, and I also tell a good number of them to stay put and keep the current loan.
No your rate will most likely go up...and might go up quite a bit. Get your loan documents and read what it says. There are some nice rates out there, so if necessary you can look into a refinance. I am not a mortgage broker, but there are many very good ones here on Trulia....they can also help you read your documents and make decisions.
good luck to you,
California Dept. of Real Estate #: 01371776
NMLS #: 271709
You need to find and pull out the loan documents the escrow company provided you (specifically, the Promissory Note and the Adjustable Rate Rider) to understand what your loan's index and margin are. These docs will have all you need to determine what will happen to your rate.
Looking for a short-cut to the answer? Call the loan person you worked with and ask!