Just curious if I really have ibs.

This is my first time posting anything on here. It took me a while to work up the nerve to talk openly about this.
I went to the gastroenterologist about four years ago because i had chronic diarrhea for a month. They asked me a series of questions and without running any tests determined I had ibs. This was new to me as I had never had a sensitive gut before. They said it was stress related ad it just comes on. So I started taking loads of pepto to function normally. Btw the diarrhea was after everything I ate no matter what it was. So now four years later I feel it's getting worse probably because of my stress of having this illness. I constantly worry what is going to make me have to run instantly o the bathroom. I don't feel like I have all the signs of ibs either. I rarely get the abdominal pain only if I have the dreaded "D" do I get crampy but not pain. I have sorry to say this gas a lot. And diarrhea that comes and goes its not consistent. Only when I eat spicy or greasy food and drink alcohol these things for sure have me in the bathroom sometimes for two to three days. And the pepto still works. It I try not to be dependent on it because I don't know what will happen if I take it go every meal. So now I just try not to eat anything all day and only eat at night when I'm home in my own b-room. So in sorry for my detailed ranting. I just can't talk to anyone else because I don't know anyone else with this. So I guess what I'm asking is does anyone else have these symptoms like me? Does it sound like Ibs? Or should demand further testing? I'm trying not to worry about the diarrhea but I have anxiety and I just fester over it an make it worse. Thank you for listening.

Thank you for your response. I will demand further testing.