Cycle day 6 and a faint Lh is this normal?

Heather • so blessed to have my 2 beautiful children!
I started Ovulation testing today on cycle day 6 and I have a faint Ovulation line.. wth my cycle is 26 days I usually ovulate day 12 or 13. I never have a line at all but I tested today because I have a hysterosonogram on Thursday and can't do it if I ovulate. But it's so early to be starting this. My period seemed normal but only heavy 2 days then light on day 3. Could I have had a chemical pregnany?!!