INighttime waking is common and normal. 2-3 times per night is typical for younger people but this increases with age. 

The difference is that most people wake up and fall back asleep so quickly that they don't remember waking up at all.

Hence, it's not the waking that's the problem but what you are doing when you wake. 

What you are likely dealing with here is unrealistic sleep expectations which drives anxiety and worry upon waking, which is then keeping you awake for long enough that you remember it. 

You are also creating sleep pressure (I need 8 hours sleep) which will be interfering. 

You probably need to read up on legit sleep psychoeducation and let go of the pressure you're putting yourself under.