What is going on with me?!?

This week has been really weird for me.... Since Tuesday I have felt anxious. I literally jolted awake Tuesday morning. Butterflies in stomach all week. Fluttery feeling. I've been nauseaus throughout the day, but it hits worse at night. AF due in 3 days. I'm really nervous to test... Married when I was younger and suffered 2 miscarriages. I just hate setting myself up, but I just feel really weird. Is this normal for anyone before a period or should I swallow my fears and test??? I would be 3/4 weeks if pregnant..... I just have no idea what is going on with me. SO is fine. No major changes to out routine/daily lives/ sleep schedule