Hi My Name Is Kaila. I Have Been Trying To

Hi my name is kaila. I have been trying to conceive with my boyfriend. I'm not to sure what to think but i had a dentist appointment today and before i went in i had a really bad metallic taste on the inside of my lower lip and cheeks. I was supposed to get my period today but instead i had light spotting 3 days ago and then a heavy bleeding the day after and then yesterday i had a light spotting again and today it i have mo bleeding. I was just wondering if you could tell me if having a metallic mouth taste and bleeding like that are related? Maybe to a pregnancy?