OMG I'M IN SHOCK

I had a chemical in December and now this has happened. I ovulated a week after we had sex (I use OPKs and we only had sex once this month). If this is a successful pregnancy this will be baby number 4 & my last. I've had 1ectopic, 2 chemicals and 3 beautiful babies.

I don't know how to tell my other half as he is very depressed at the moment because he lost his job a few months ago. What do I do?