I'm scared

I had a crush on the same guy since the 2nd grade. He always considered me as a friend so years went by ....I got married had 2 kids then went through a divorce. During my time of sadness, he came around. One thing lead to another and now I might be pregnant with his kid if my period doesn't come on. I'm freaking out because my blood pressure got really bad when the two I have and it was suggested to me to not have anymore. I dont know what to do. My family hates me enough.