Go in get scheduled for a ultra sound, MRI and other physical evals definately sounds like a Partial tear but it should be diagnosed so that you actually know how severe it is.
I know there is a predisposition on this board for what ever reason, for people to dole out medical advice and diagnosis as well as home remedies etc.
But the bottom line is it is impossible to diagnose a damn thing over the internet let alone give out a reccomendation for treatment for something that cannot be diagnosed over the internet.
Granted what you describe one could throw a good geuss at. If it were my body I would get my self to a competant medical facilty and find out exactly what I did so as to not make matters worse.
Look at it this way if your self diagnosis is wrong or your use of well meaning but missguided advice leads to more complication up to and including rupture, avulsion of the tendon or actual tear of one of the heads of the Bi’s you are gonna be down a lot longer than you would if you simply got it diagnosed and and treadted properly many times these injuries need to have the arm casted to limit movement so the tendon may heal properly’
Not worth the roll of the dice to me, I wish you the best and good luck to you.
P.S. Last year I broke my forearm and was casted for a bout 3 mos’ I was rehabbbed and back up to my regular post injury arm size (Muscle Memory) in about 30 days post cast and to day I am even stronger than before didn’t slow me down a bit it was just kind of a break my body responded like gangbusters after the lay off. So there is a upside to recovery . Hang in there it will be allright in the end.