TTC and period weird this month?

So me and my husband are currently trying to conceive. This was our second month of trying.
I was anxiously awaiting the date of my period starting as I am sure all women TTC do and was so disappointed when it arrived 3 days early on Monday. The strange thing is it started just like a normal period for me but today it seems to have stopped. 
Anyone ever had this happen and offer any insight? I am contemplating wether it is a sign I am actually pregnant but may just be getting my hopes up. If it's possible that I could be, when should I take a test?