Elbows???

I've been doing bodyweight fitness for over a year, and I keep getting sore elbows...

I'm a guy, and I weigh 145 lbs.

I usually do at least 100 push-ups and 30 pull-ups every weekday. I'd like to double these numbers. Sometimes I've tried a morning and night exercise routine to get there, but...I'm getting sore.

I also do like 100 swings with a forty five pound kettlebell. Not sure if it makes a difference, but I also run a mile. That's my whole routine.

Is this safe? Am I going to be an old man with fucked up elbows? Has anyone been through something similar?