Travel nightmare -----> Would you please correct my errors? (*:*)

A Travel nightmare is a difficult situations that makes your vacation devastated a disaster and full of stress (I would say stressful). I remember, when I was younger (at age of 20) (go with either younger or 20), I accepted an offer to  in Shiraz University to complete a course in electrical engineering at in the second semester. Until then, I hadn't traveled lonely alone, so I decided to try it. Then, I took a bus ticket to Shiraz without wasting time I caught a bus to Shiraz straight away (you could also say immediately).

<new paragraph>After 14 hours, I reached arrived in to Shiraz and went to Shiraz the University.u but Unfortunately they said that they wouldn't register me until the next semester. That was very hard situation for me This was difficult because I was too young and couldn't stay to be in that an unfamiliar city.

<new paragraph>I was very sad and upset, so without paying attention to the time and distance between Shiraz to Qazvin, I went to the terminal at 10 AM. The Qazvin bus was going to leave Shiraz at 14 (1400 hours or 2pm??) but I couldn't wait. I decided to get bored aboard on a bus to Tehran and then go to Qazvin.

<new paragraph>In Isfahan I realized that I made a critical mistake because I would reach to Tehran at midnight. My fellow traveler was a Mullah, a religious person, from Qom. He asked me why I was sad. and after realizing that, he repeatedly told me I told him my story and he said to me many times that I would reach Tehran very soon and I had to chew the cud. I reached to Tehran and I had to stay at terminal until morning.

In conclusion, after that event through this experience I learned I understood that before doing any important work I should spend time making travel plans carefully in the future! to think about its consequences carefully!