Different dates

I found out I’m having twins and one was measuring 7w+4 bpm 177 and the other 6w+1 bpm99. Has anyone else had this situation and everything came out ok? I really hope I have both babies even if only one survives I would still be happy. My dr said when this happens the bigger fetus is absorbing the smaller one but other times it could just mean one baby will just be born smaller. I’m just freaking out because there’s not a lot of information about this. I have an appt in 2 weeks, I’m just obsessing because I really want both babies to be ok.