You don't say whether your jobs are secure and that's the biggie. If one or both of you lose your jobs you're likely to be competing with many others in the same position, so even highly sought after people can struggle to find another job or might have to take lower paid work. Plus the situation is made even worse by companies having recruitment bans, so fewer jobs on offer.
Try to set your outgoings so you can live on far less than two full time incomes - mitigates against job loss or having to take a lower paid job, will help you build up some savings if you don't spend all your money each month and this will help if you have a child as you then face either spending one of your salaries on childcare, or one of you being a SAHP or working part time.
YY to making sure you can cook well with cheap ingredients and think carefully about the amount of money you spend on food and drink out of the home. It is massively more expensive to eat out, buy lunches out etc, many people easily spend hundreds of pounds a month on this without realising how much a few quid a day adds up to if you do it every day.
Definitely don't rush to move house or take on a bigger mortgage, but it's worth remembering that if prices do drop, it can be a good time to trade up, because if prices drop 20% across the board, the amount of £££s a bigger house drops might be more than the amount that a smaller house drops, so it can be cheaper to move if you can afford it that is.
But the flip side of this is that there might be fewer FTBs so it might take longer to sell your house, if fewer people have the deposit and income to be in a position to buy.
I don't see interest rates increasing in the short to medium term as there is so much personal, business and government debt out there that it would just prolong the agony. Even though certain sectors appear to have recovered since the 2008 crash, a lot of it has been propped up by prolonged historically low interest rates, making it less expensive to borrow money and be in debt. Plus people thinking there's no point saving, as they don't get any interest. But there is a point to saving, it means you have access to money when you might need it.