How long do I wait

So I had a miscarriage 3 months ago how old am I suppose to wait is there a time my doctor said after one period am ok to try but I was seeking advice from other doctors and some are telling me 6-9 months wait ? What do you think or had experience something like this before I really wanna try the soonest i can I wanted to try after my first period but decided I wasn’t really don’t grieving so I was not up to it and am still on the idk side just do to its so hard to go threw thank you guys ahead of time !!