Hi, you are right there is'nt much anyone can do, i would say the vomiting has'nt helped, but still take it easy, no heavy lifting, sex etc.
I have had bleeding in every pregnancy, it is so stressful.. around the end of the 1st trim mostly it goes away, some of mine have lasted longer.
I have baby no 5 due in 3 weeks time so it is possible to be successful in carrying to term.
Good luck, just remember every scan and every week that goes by your odds of MC decrease, I think it is highly unlikely to go that way, but take care.