Getting the symptoms

Tashia • I’m a 30 year old woman who is married to an amazing man and a mom of a 9 year old. Loving life ❤️❤️
How early could u get symptoms of being pregnant. Had sex the 8th of this month 4 days later got my period regular. Would it b possible to get pregnant 4 days before period and get the symptoms after period. Got a migraine been exhausted lately. Boobs hurting. Feeling sick. Am I over reacting?? No bashing please