I've researched here but didn't find any information about the problem I'm having right now.

I drive 02'EX-V4 mileage is about 65k.

When I'm driving/parked, and put left signal on, green light inside blinks really fast. right blinker is fine.
From outside, driver side rear/front blinker doesn't work. but when I put on my headlights (lowbeam), driver side rear/front light comes on(the parking light). but blinker does't blink.

tricky part is,
they work all the sudden, and then they don't work again.
Is my car just getting old and not functioning correctly? I checked all the fuses, they are fine. I even taken out the signal bulbs and checked. They are fine. what kind of problem is this? by the way, temperature is about 20. pretty cold. I don't think this has anything to do with it. But just incase. I'm not an expert.