Overslept!

I overslept this morning, so then / so as a result I don't have a lot of time to spend with my son. Therefore, I want to wake up earlier tomorrow morning! 

Good job! As originally written, your three sentences are fine, but stand apart and do not really tell me, as the reader, what you want me to know. Thus, I "joined" them together since I felt that is the message / the thought that you wanted to convey. I left "...I don't have.." as is since it is fine if you are telling me this right now (present tense), but it could also be "...I didn't have..." if you are telling me this afterwards (past tense). I also changed "early" to "earlier" since it emphasizes that you want to spent more time with your son which, although unstated, is understood. I hope this helps you! J. (p.s. Cute kids in the picture! They have more tattoos than I do!)

Overslept

I have overslept this morning.I don't have much time with my son.I want to wake up early tomorrow morning!