Hi br! Welcome to CWE.

I agree with Robinn's advise. Definitely consider what you are consuming. Also, you should start looking at other things like sleep and stress levels. While you wait for your appt., try keeping a journal. In it, write everything you eat and drink (when, where, and how much), sleep (how much and when), stress (any new stresses? illnesses?colds/flu?), odd feelings (odd smells/tastes/sounds, migrines, deja vu, prickly feelings, numbness, etc...), if your a female your time of the month, and seizures (where, when, how long it lasted, what you were doing prior.). I know, it seems like a lot.... Take the journal with you to your appt. The reason being, that the more information your doc has, the better they can develop a treatment that will work for you.
Now, make sure you remember to tell the doc every med you are on, including vitamin supplements. Ok? All this info will give him a better picture of what's going on. You might want to write down any specific questions you have for him/her. Also, keep going with the journal...even after your appt. The reason for keeping such a detailed journal is to see if you can find a pattern..a reason for the seizure..a trigger. For example, common triggers are :lack of sleep, too much stress, too many stimulants (these can be found in cold medicines, coffee, tea, sodas, energy drinks most commonly....). Others include flickering lights or patterns, certain foods/drinks, food allergies, certain smells and sounds, etc. As you can see, triggers are incredibly varied.
Now, to give you some basic info.... Everybody can have a seizure. And there are lots of people who only have one seizure in their entire lives. Ok? For person with epilepsy, it just doesn't take as much to trigger a seizure. Your father's was due to head injuries. But you might not actually have epilepsy. What the doctor will want to do is run some tests....EEG, MRI, etc. Also, seizures are not always due to epilepsy. Other things like low blood sugar and low blood pressure can trigger them too. so your doc will probably want to rule out those causes. Be cautious if the doc just writes you a prescription and doesn't really order any tests. A good doc will want to rule out any other possible medical conditions before he diagnoses you with epilepsy.
Check out the info in the Epilepsy 101 link in my signature...and check out the info on the alternative treatments as well. You've gone 24 years without seizures...who knows, this may be your only one. However if the test results come back and you are diagnosed with epilepsy, then you'll need to decide whether you want go with meds, or try alternative treatments, or maybe use both, and talk over the options with your doc. There will be some lifestyle changes, and you may find that you lose your driver's license for a little while. (It's hard to say for certain, as each state is different.)
As I said, welcome to CWE.

Feel free to ask questions, vent in the padded room, or just chime in.

You're not alone.