Well, you have a history of seizures and now you are losing time and waking up injured and sore...don't you think that perhaps seeing a doctor should be a little high up on a list of priorities
You live alone and have bashed your head twice, compare that with the tests you will need to find out if you are indeed having seizures...it's not so bad. If you are indeed (and it does sound like a good possibility) having seizures you should find out for sure and see what treatment will be best for you. I have had seizures while alone and have not suffered serious injury but have knocked out a couple of teeth...not fun! Also, take care of yourself, get sleep etc., it can help.
Cheers and good luck!