Miscarriage symptoms?

My sister had one before, and she told me that her neck and shoulders hurt her to where she thought they were going to lock up on her. I’m having that feeling, but I don’t know if I’m pregnant or not. Me and my fiancé have been trying to conceive for 2 months now. This would be baby #1. Has anyone else had any pain like that? My period is in 3 days.