I've been taking a pea sized amount of testogel for three weeks and I've noticed that I'm suffering from really bad back ache. Upper body and almost like the pain I get before I'm going to get a huge cold. But no cold comes and apart from the back ache, I feel fine. Has anyone else experienced this or is it possibly unrelated. I've not applied it today to see if it lessens but I don't really want to stop if it's unrelated.