Good old mumsnet and its parallel universe.
'Yeah of course you should very quickly marry this man you met in May this year, and get pregnant by him asap. I mean what could possibly go wrong? Take no notice of the naysayers, they're probably jealous of your wonderful whirlwind romance.. I met and married MY husband within a month of meeting him, and had a baby within a year of getting married.... 27 years later, here we are, still blissfully happy. When it's right, it's right.......'
Meanwhile, in the real world, any woman suggesting she was planning on marrying a man she met only 5 months ago, and getting pregnant as soon as possible by him, would have everyone she knows trying to talk her out of it, telling her she is making a mistake as she hardly knows him, and telling her she's batshit!
As some posters have said, marrying this man so soon after meeting him, and then having a baby really quickly, is a recipe for disaster. A baby is not the easiest thing to cope with, and in a fresh, new relationship, that has not built any real foundations or strength yet, I would not envy either you, OR him.
Not much help I know. But you did ask. Yes it's too soon. You cannot possibly know this man at all. You are still very much in the starry-eyed, Honeymoon phase.