Help - 7 1/2 weeks pregnant and cervix very, very low - support for womb????

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Hey everyone
Just wondering if any of you have any experience of using a ring when pregnant to support the womb???? My cervix is really, really low and I know that hopefully it will start to rise as the pregnancy progresses - but it's right there at the entrance and I'm so worried it's going to come right out. Would a ring push it back in? My ob doesn't like to use rings and I must confess, I'm of the "use it or lose it" mindset. Don't think the cystocele or rectocele are helping matters at all but I can cope with these if I know that the womb is safe - if that makes sense. Can anyone offer any insight at all?
Regards J xx