TTC questions

So I really could use some feed back!! I'm at a total loss. Me and my husband have been TTC but I missed my period last month and not to sure when I will have one this month! And I'm just not to sure if I take a test 2 weeks from every time we have sex or when I'm supposed to base it off of since I don't know when I'll ovulate considering my periods?? Any ideas🤔😩