One of the main symptoms of mono is that it makes you extremely tired. I would be trying to do my homework when I had it and I would just like not be able to type anymore because I was falling asleep. My tonsils also got really swollen and those were the two main symptoms that I had.
So, some symptoms of mono that you should be aware of is extreme tiredness. Like if you are so tired that like you get like 12 hours of sleep a day and you are still tired, you probably have mono. And if you're like getting sick, like if you had a cold and then you had a weak break and you have another cold, you probably had mono.