Sleep is a tricky beast with so many variables to keep track of rather it be what you do during the day or how you prepare just before going to bed.
Was there anything happening that caused you to wake up? Were you awoken because you had to go to the restroom? Did you have naps earlier in the day? Did some noise wake you up or was there someone next to you that caused you to wake?
30 minutes is a long time to break your sleep cycle but the important thing is that you are getting back to sleep at least an hour or so before you wake up for the day because at least then you are getting some of the best quality sleep which is always at the end of your sleep cycle.
Grogginess is why I stopped attempting lucid dreaming. I may try lucid dreaming again as a novelty but only on days when I don't have to work or do anything important the next day... which isn't very often lately.
If you want to try a sleep supplement, I highly recommend "liquid melatonin" and just a touch of it. I buy a nose-spray bottle called "snoot" on amazon and the "sleep soundly" liquid melatonin. Just one spray into my mouth (NOT the nose.. burns too much lol) and I'm gently nudged into a long night of sleep with no grogginess in the morning. Works perfectly for me.
I also use ear plugs because I'm a very light sleeper. I can totally feel the difference in depth of sleep when I use ear plugs. Oh, and I keep my room as dark as possible. I used to be terrified of very dark places but now that I see the difference in sleep... I just have to have a very dark room. Oh, but I can't stand to have the eye covers on me... and occasionally the feeling of the ear plugs even bother me so sometimes I end up taking them off during the night.
glta