Pregnant after 4 miscarriages

I have had 4 miscarriages & the last was Dec 2015. I just found out I'm around 4 weeks pregnant and in the process of getting my hcg levels tested to see if they're gong up... I can't help worrying about symptoms coming or going, or lack of. I'm constantly paranoid and I trying my best not to be... I should be getting a call on the labs next week.