Help ! If Anyone Can Relate !

LaLa 💔5MCs👶🏽🙏🏽🌈
Af due 02/14
I spotted on the 13, took a test and it was negative. "AF  " came on the 14 and lasted 3 normal days. 
All weekend after no bleeding. Sunday I feel sick so I test . To my surprise it was positive. Levels checked on Monday it was 300. Been spotting since Monday . Sometimes pink , brown and light pink. Has this happened to anyone?