Do I have anxiety? Whats wrong, please help?

So my husband is in Afghanistan right now so now im alone in a different state with two children and my family is in another state. Ever since hes left my anxiety has skyrocketed I worry about my children all the time because I think of it as if anything were to happen to them it my responsibility. Also but the problems start at night. I have a one year old and I check on him about 15 times a night and he has to sleep a certain way and if he moves I will check on him some more. Or if I hear something I go in his room I find reasons to get up all the time. Im losing sleep and I scared to go to the doctor I dont want anyone to think im crazy. Please help.