We only are able to have sex once or twice ever other week to every few weeks. Is it normal for me to bleed every time? We don't get to see one another but once a week, twice for a few hours if we are lucky. I'm in school and work full-time, he's in the military and has a very busy job. 

I don't always bleed when we have it, but it has been happening on and off even with gynocologist visits and a trimming of the IUD string that I have. I usually am pretty well lubricated down there so that's not the issue. My doctor says it's mainly because we don' tdo it very often that it bleeds (it's not a big amount of blood either) but I usually bleed slightly for the rest of the day into the next day. It's still a concern of mine even after seeing the doctor for it more than once. Any advice?