It is good that you are asking for opinions, because analyzing your rides will make you a better cyclist and help you achieve your goals.

One thing I always do is if I feel funny or different is I will stop my bike at the nearest safe spot, and I will get off the saddle and think about my symptoms. Usually it is all related to fluid and food consumption, and so it is a learning process to figure out what type of fitness water or sports drink to bring, what type of fitness food, how many calories to eat per hour and so on. It takes a lot of rides to figure out which combination works best for you. For example, what works really well for other cyclists on this forum would not be effective for me.

When you get symtoms that you don't recognize, or that you don't understand, it really does help to stop, drink and eat, and think about it. All sorts of things can happen to a cyclist, and just because it has never happened to you, doesn't mean that it won't in the future, or that what you may be experiencing is really the preliminary warning signs of something more serious if you were to continue cycling for another few hours.

Then when the ride is over, analyze the ride so you know how to do better on the next ride, just like you are doing now by starting this thread.

Darcy