Suggest Remedy For Pain In The Calf With A History Of MS

I m having a dull pain in my left calf, jt started this morning. I have MS and have a lot of problems with my legs. I take Zanaflex 2mg, 3 times a day & 8mg at bed time. Iwas wondering if I could have a blood clot in my leg. I have been doing a lot of sitting lately. I use a heat pad at night and that sometimes makes my legs feel better. Sorry I DID NOT KNOW I HAD TO PAY FOR THIS. I ll call my doctor!