Question about ear stretching?

I'm a 14 year old girl and about seven weeks or so ago I stretched my ear to 2mm. It just kinda slid in, but my ear felt quite hot afterwards. Three weeks later, I put in a 3mm stretcher. Again, it just kinda slid in, but my ear felt hot afterwards. I've had my 3mm stretcher in for four weeks now. On Saturday, I was at my cousin's house and I tried putting her 5mm stretcher in. It went in with a bit of difficulty, but it didn't hurt at all. But it bled, a lot. When I first put my 3mm in, my ear bled a lot to. I want to go up this weekend, so shall I go to 5, or just go to 4? Thanks in advance.