Feeling Helpless and Waiting for My Second Sip of Coffee...

I hate feeling helpless over a situation but when it involves my kids, it makes it so much harder. As I've mentioned before Noah has had issues going to the bathroom. We've been giving him more fiber, applesauce in his bottle (he likes it but will only eat it from his bottle), medicine the doctor gave me 2 weeks ago, and still he strains and cries in terrible pain just to get it out. All I can do is rub his forehead and tell him I love him over and over and tell him I wish there was something I could do to fix this. 
As this happened this morning, before I'd even taken my second sip of coffee, I couldn't help but start crying. I feel like I'm doing everything I need to do to help my son but as a result, I'm apparently not helping him because he's still in pain. We all know what that feels like. We all do what is necessary to remedy the problem and within a day, we feel all better. This has been going on now for about a month. Every single time he goes, it comes with strain and pain. There hasn't been a regular one in a long while and to go through this everyday and giving him a little more applesauce in his bottle, or a just a tiny bit more medicine in his bottle that might help....and nothing helps. 
I'm taking him back to the doctor today to see if there is anything else we can try. I'm also going to ask about a lump on his thigh. It's where he got a vaccine over a month ago and there is still a lump where the shot was and I don't understand why it would still be there.
I just want some answers and I feel like I keep formulating more questions in my head, while still waiting on the questions I've had in my head for months. My brain is tired. 
I'm going to leave this short for now. Little man is still trying and I don't want to be sitting at the computer too long.  
Have a good day everyone.
Jenna