Confused

Sa

So was due on my period two weeks ago and I started to bleed which I thought was my period but it never got any heavier it was just spotting so it is only a little blood when I wipe, I’ve had this for now three weeks, I also have sore breasts and feel tired! I’m so scared to do a pg test as I had miscarriage last year and we have been trying for over two years! What do people think this could be, could I be pg even tho I’ve been spotting for three weeks or could I just have a hormone imbalance?! Any help or advice would be great x