Last Night I Was Awoken From A Deep Sleep With

Last night I was awoken from a deep sleep with a severe and stiffening pain in the back of my upper left calf just below my knee. I can't remember the last time I had a Charlie horse, but that's what everyone I've asked has said. The pain started around 3am and woke me up in excruciating pain (I was yelling and crying and unable to move my stiffened calf). Charlie horse would make sense, but it's still hurting today 12 hours later.
I am a 22 year old female. I have recently had a bout of allergies/cold that's persisted the last 3 days. I am on birth control and I sometimes experience shortness of breath and other subtle muscle spasms. I has tendonitis as well but this pain is deep in the muscle. Thanks for any advice