I've been taking Lo24 for 3 weeks now, winding down to the last w...

I've been taking Lo24 for 3 weeks now, winding down to the last week when usually on my last B.C. Ortho Tri Cyclen 28 - I start my period. But this past 2 days, I had severe back ache (not muscle, but like joints) lingering to my legs and arms. I felt very sick to my stomach. I haven't started my period yet. I thought I was sick. But I didn't have a fever, just very bad back and body ache that literally didn't go away for 2 days straight. Luckily that was during the weekend, I did end up going to work come Today, but I still feel it slightly - very irritable and it feels draining. I will be seeing my MD tomorrow. I check in on my status, if or if not it's due to Lo24.