If you really want children, you have to start thinking like an adult & a parent. Why do you want kids? If it's just because you suffered a tragic loss years ago, is that really enough? For what it's worth, I am sorry that you lost that child; I can only imagine how painful that must have been.
Why not look at this logically even though it's an inherently emotional issue?
Take 2 sheets of papers & fold them in half long ways.
On the first write: Reasons to start a family now. Underneath that heading list all the reasons in the left hand column.
One the 2nd write: Reasons he wants to wait. (list the excuses he's been giving you). If you think he's open to the discussion (& I don't think so), have him write this list. Then you need to counter every single argument. For example if he says you need more space, point out that you are moving to a bigger place. If he says you two don't have enough in savings to survive 6 weeks while you are not getting paid, find a way to come up with 6 weeks of savings in cash in the bank before you even conceive.
Once you have your points marshalled, sit down & discuss it with him. Part of him may simply be scared that he's not ready to be the provider for a family. It's a huge responsibility.
Let me weigh in here though on the money side. If you two can't survive financially without 6 weeks of your pay, you have absolutely no business having a baby. I wouldn't even consider bringing a new life into this world unless I had an emergency fund of at least 6 month to a year of living expenses, meaning that you could survive without a change in lifestyle while having absolutely no money coming in. Seriously, what if there is a complication with your pregnancy & you need more than 6 weeks off? Then what? God forbid that you have a special needs child who requires 24/7 care? How will you cope with that? No offense but I can't imagine that a waitress in a buffet restaurant has the best health insurance, Obamacare notwithstanding. How are you going to pay for baby furniture, clothes & diapers? Decent commercial daycare will most likely cost more than you make a week at as waitress. (I'm not knocking the hard work done by food service workers but I am saying you have to be practical.) If you make $50 - $100 per day in tips & work 5 days per week, you probably average $400 per week. At least around here, daycare starts at $500 per week, plus tax & miscellaneous expenses. Even if a family member cares for your baby at no cost, its; only fair that you chip in for food or give that person something by way of thank you.
In all candor I think you are in love with precious little bundles of a joy but you are such a dreamer that you have absolutely no idea how much it costs or what the sacrifices required to have a baby are. It's great to want to be a mom. If you have that much desire to be one, on a love scale you will probably be fantastic but don't you think the greatest gift you could give you child would be stability -- both financially and emotionally?
Good luck.