FX channel (channel 43 in San Diego) isn't coming in anymore

I live in San Diego in the SDSU area. For about the last week or so, I no longer get the FX channel (43). I watched movies on that station quite often, but can't anymore because a message pops up on the screen which indicates a "Weak or No signal". Is anyone else having this problem? I still get channels 2 - 65, and 1005 to 1011. There were two other channels I didn't watch much which stopped working a few months ago: 13 (KCOP) and 26 (WGN). I'm not sure if those channels were supposed to stop working, but the picture on channel 13 is just snow & the sound is static now. Channel 26 is now a black screen (no picture / no sound). I connect the cable wire directly to my Samsung Smart TV (no cable box).