advice on sleeping habits for 6 month old

i have a 6 month old that is nursing and eating 2 times a day solids. we just put him in a sleeping bag to sleep. he has good nights but it seems like he wakes 5-6 times a night.  he is also teething.

whats up? do you think it is b/c he isn't used to his arms being free? teething?

HELP!! i also have a 3 year old and i am tired.

6 months is often a time with lots of waking.  They are learning all kinds of new milestones, teething and becoming more aware of their own bodies.  I would say to read "no cry sleep solution"  and remember that this too shall pass.