I need some advice

Ok so I had a miscarriage in November found out I was pregnant again in December I had some bleeding for 3 days an had testing saying I had a second miscarriage an both times I caught my baby in my hand I'm still waiting for my period but I still feel pregnant aside from tender breast I'm still gaining weight still nauseous sick feeling but someone told me that it's possible to miss carry one twin but the other twin still stay attached idk I'm confused an my period has yet to come any advice