So I pulled my rhomboid about a month ago doing T-Bar rows. I basically bent down to pick up the bar, and being an idiot I didn't lift with my legs and felt my left rhomboid pull. I took about a week off, did some serious stretching and foam rolling. It felt better so I started lifting again. It felt okay when I was lifting, but ached a little bit after I finished my workout. I've basically been training like this for the past 3 weeks, just dealing with the pain. It's not severe pain by any means, but my question is- if I'm lifting on a strained muscle, is that going to hinder my muscle growth? I have no problems with the muscle when I lift, but after my workout it aches a bit. I can totally deal with this as it doesn't really bother me too much, but am is it preventing my back muscles from growing? If so, I will take time off. Any help would be much appreciated!
Edit: I've been heating it at least once a day and stretching it daily. I've taken a week off from all lifting, and it feels slightly better. How will I know when I can start training again? Last time it felt pain-free I tried lifting and the pain returned. I want to be rid of this nagging injury for good!