Hi MissWho,
Welcome to the forums. You've come to the right place. Post again in the INTRODUCTIONS SECTION and tell us what type of diabetes you have.
When do you take your Lantus? For some people it doesn't last the full 24 hours, which may explain your night highs. Or it may be a case of the "dawn effect" where your body gets ready for the morning by getting a little boost of sugar from your liver. Or you may just be overdoing it on carbs for dinner
Looking forward to getting to know you,
Mich