Signs of early labor?

Ci
I'm currently 34w6d and on bed rest for my blood pressure. I've never gone into labor with my other 2 kids so I don't know if this is early labor or what. The past 2 days I can not get comfortable at all. Sitting, laying, nothing. Today I have been overly emotional crying so hard I'm hyperventilating thinking of all that has to get done still. I know from my last appointment I was 50% effaced but not dilated last week. I also am having horrible horrible headaches but I'm not sure if that's from crying or what. Please help.