It seems like your problem is your reality check.

Now keep in mind I am no expert I have had only one semi-lucid dream a long time ago.

My advice is to do reality checks all the time, even if your at school and know your not dreaming. Before you know it you'll be doing one in a dream and never expect it to work.
Another thing is to know when to do reality checks, if anything seems out of place or abnormal, try and stuff your finger through your palm or breathe through your fingers.
A couple examples of that:
Today in math class the teacher was talking about something I vaguely remembered at first, then he said something related to that (about the number 23 I think) so I instantly did a reality check.
I was making garlic bread, and I thought I picked a piece of garlic out of the bread, but it was there, so I tried to stuff my finger into my palm.

Anyways, if you need seriously serious help , then try googling around and looking at some videos, and above all, don't get discouraged, if you really want it, you got to try night after night until one day you'll have one.

Hope this helped.
Sweet dreams.