Excited and Freaked out

Ok so I have just found out that I am pregnant...yeah!! and woah at the same time. I have 2 kids already 7yrs and 4yrs and it's great. I have been wanting another one for a while but finances and things kept me from making that kind of decision....but now I'm at the point where my husband has a new job and my job is going well so...we were less careful than usual.....and here I am. I am excited because I love the idea that we will have another little person in our lives but on the other hand I'm nervous. I fall into the "high risk category now that I am over 35 so there's that...I also have had one miscarriage 6 years ago and I worry about that too. Usually I'm pretty excited about being preggers but this time I feel more scared than normal.....and it's freaking me out!