Heavy Traffic OR A Huge Traffic Jam

I am on the way to meet my friend, but the traffic situation is not good. Many cars are at a standstill stucked on the road. I am suffering from anxious because of the traffic jam! I think I am going to be late...

In Korea. summer is almost gone and autumn is on its way coming.
I can could feel a changing in the weather when I woke up in the this morning. I have a sore throat, that's why I am wearing .hence i wear a blue jeans and long sleeve pink sweater. Everybody is expecting  watch out cold weather.

Heavy traffic jam

I am on the way to meet my friend., Bbut the traffic situation is not good. Many cars are stucked on the road. I am suffering fromin the traffic jam! I think i am going to be late...

In kKorea., Ssummer is almost gone and Aautumn is coming.
I can feel athe changing weather when i wake up in the morning. I have a sore throat, .henceso i wear a blue jeans and a pink long sleeve sweater. Everybody watch out [1]for the cold.

Explanation of some corrections:

- When you start a sentence with a conjunction (and, but, yet, so, etc), it sometimes works better to combine it with the previous sentence. I thought it read more smoothly to do that with your first two sentences.

- The past tense of "stuck" is also "stuck"; it's an irregular verb.

- It sounds unusual to say "I am suffering from traffic jam." Usually "suffering from" is used to talk about having an illness. I understand why you used it, but in this case, it makes the traffic jam sound like an illness, haha.

- Seasons (fall, autumn, spring, winter) are not capitalized.

- "Hence" is somewhat formal, and usually used when making an argument.