Sorry for your loss.
Yes, you can try for another baby. Has the doctor given you any restrictions however?
One problem is that a home pregnancy test will not work. If you took it now, it will show you as pregnant. The hCG levels will continue dropping so you'd need a quantitative test (how much hCG) , usually a blood test, instead of the urine test (usually qualitative - are you/aren't you). It won't hurt the baby if you do get pregnant.
Your cycle may take a while to settle down.