Period? Pregnant? Getting it back in sync?

Alright period was march 19th and then didn't have another until may 28th. Normal periods are 22 to 52 days but this one was 71 days in between. I took 14 pregnancy test throughout it and two on may 26th came back slightly positive and the next day it was negative again. Period was 8 days this time in stead of 6 like normal and cramping was heavier and period was little heavier than i normally do but I am always heavy. I finished my period 2 days ago and my boobs are sore and feel the most sore by time I go to bed. Also my discharge is slightly milky like before i normally get my period so do you think it was a miscarriage/chemical and my period is about to start? Surely I can't still be pregnant and i tested negative yesterday. Whats your thoughts. Test was the vvvfl i had.