I hurt my shoulder a while back. After a doctor's visit, and a very minor surgical proceedure, I was told 4-6 weeks for return to golf. That was about 3 weeks ago. My shoulder feels great, and normal everyday use is not a problem. However, a full swing of a golf club is not considered "normal everyday use" by my doctor. I am most likely not going press my luck for at least another 2 weeks.
As posted above, you should go see your doctor. What you might think is tendonitis, might be something worse. Plus after a week's rest, and your elbow feeling great, it might not actually be ready for the rigors of a golf swing.
For any hobby/pasttime the constant pursuit of "progress" can produce a diminishing return. I'm fighting it right now. I've been practicing a lot and watching my scores get worse and getting fed up. But why should I be working so hard and getting frustrated at a game that I'm supposed to be playing for fun? This past weekend at a member meetup I shot a "stellar" 122 and had a blast doing it. And that's the real point, isn't it? Having fun? If you're playing golf "for fun" (i.e., not to put food on the table and roof over your head) but need to somehow reward yourself when you don't swear at bad shots, maybe your focus in the wrong place. That's all I'm saying... I may be wrong.