How old are you now?
Perimenopause can start 10 years before the full menopause kicks in.
Can you go to get an ovarian reserve test and hormonal tests? The NHS should do them, I think. You will get a better picture of where you stand.
Then, have a long, hard think about whether you really, really want kids or is it just a passing feeling related to choices closing down. It you decide you really have to have kids, start looking into options (depending on what you find out at fertility centre) to become a single parent.
Do you really want a man in your life? Or is it just if there is a child involved? Are you fulfilled in your life generally? Are you thinking kids is the answer when your issue is maybe career dissatisfaction or boredom with life in general? Only you know the answer to these questions.
If you don't want to go into motherhood on your own and want a man, you will need to start expanding your social life and try and meet one who wants the same things you want. If having a child is imperative, you may not want to spend too much time waiting for a man though, depending on your age and what the fertility clinic has told you.
You need to have a long hard think about what you want regarding children, a man in your life, etc.
This article may help you straighten out your conflicting thoughts:-
www.psychologytoday.com/blog/motherhood-rescheduled/201310/not-sure-if-you-want-kids-0
Also, this is an excellent website:-
gateway-women.com
Good luck in your soul-searching, OP 