Pregnancy test after miscarriage

Hey all.

Hope some one can help with this question!

I miscarried a 5 week pregnancy on 20 Oct (I bled until 27th). I ovulated from 9th November and I think I ‘may’ (fingers crossed) be pregnant.

Problem is that I don’t know when to test because I don’t know when my period is likely to be? Has anyone been through this that can help?

Thanks in advcance
xxxx