You may be able to refinance even though you owe more than you home is worth. New programs for Fannie and Freddie, allow people upside down to refinance their first mortgage. To qualify for this, your current loan must be serviced by either Fannie Mae or Freddie Mac. Call your lender to find out if the loan is serviced by Fannie or Freddie... if it is you have hope for a refinance. I would not recommend a loan modification unless it is the only option available to you, and the modification locks in a 30 year fixed note.
Moving on... I would definitely try and refinance your current mortgage. Mister VA points out a couple of things regarding your interest rate and its composition (index and margin), but he does not mention the overall sentiment in the market which is: inflation is coming, and when inflation hits whichever index your current adjustable rate mortgage is tied to will skyrocket taking your interest rate and monthly payment with it. If you stay in this loan I sincerely believe come the adjustment phase, you will be spending significantly more money on your mortgage payment. You build the boat before the storm, now is time to refi (if you can) while rates are still historically (and artifically) low. If you wait the consequences may mean weather you are truly not prepared for.
Bottom line, there is not a single person in an adjustable rate mortgage right now that should not be exploring the option of refinancing into a fixed program. With rates as low as they are, and serious inflation looming, securing a low fixed interest rate now is one of the wisest investments one can make in this troubled and volatile market. There is no reason not to explore and consider your options; this does not mean you have to move forward, just do your research; then make the decision on whether moving forward is the right call.
I hope everything works out for you.