Is this backache?

Ashley
Having never been pregnant I have no idea what pregnancy backache feels like!
What I do know is I have a dull pain on my left side at the back, it is fairly high up - probably half way up
I'm ttc and currently 5 days since my positive opk. I've had some red/pink cm (tmi!) since ovulation which I've put down to ovulation bleeding 
No other symptoms but does that sounds like a 'pregnancy backache'?
Thanks ladies :)