Pregnant... already?

I just had my daughter in August, she’s almost 6 months old. I have a 2 year old son as well. Well I’m late by 3 days now. I’m having pregnancy symptoms besides my period being late. Should I wait a few more days then test or go ahead and test? My anxiety is getting to the best of me because I dreamt I told my dad who passed away last year that I was pregnant with twins. 😂😳 freaking myself out probably.