20 & ttc please help

Dasha
Hi, im 20 years old & have been ttc for 6 months. 
Recently i had a period that lasted 55days (doctor stated it was hormonal imbalance). And i ovulated on the 26/27, i had unprotected sex the 28th around 2am. Well approximately 7days later i started spotting & experiencing nausea & bloating & sore breasts. I have been spotting since on & off. My period was scheduled for today but all i have is light spotting. Could i be pregnant or just having an early period?? 
Someone please help, im completely confused and nervous.