When is it time to try again

In the picture below was after I knew I had miscarried but there was still part of the sac left. I took some medication to help me pass it, and I believe I did. My question, however, is when is it safe to try again. My doctor said I can try again as soon as my next cycle hits, but is that still too soon?

I have rH factor so I know my body can reject babies left and right. I just don’t want to keep suffering the same gut wrenching feeling every time I fall pregnant if I start trying too soon.

Tell me I’m crazy, or that it’s all gonna be okay. Tell me there’s hope. (I know I’m dramatic, but maybe humor me.)