I think I'd keep up with it but I'm just not sure if things are expected to get worse with respect to interest rates in the next 3 years. That's my internal debate
The thing is no one knows so you then have to ask yourself what type of person you are and your risk factor so to speak.
Variable is a higher risk but you have more flexibility to pay down your mortgage without any repayment charges and you can usually switch to a fixed deal at any point pretty easily. But i suppose that'll be after you feel the burn of an increased monthly payment.
If you don't want the hassle then a get a fixed if its affordable. 5 year rates are better but of course you are locked in for a longer period. So maybe get a shorter 2 year fixed deal instead... so that you can assess the situation in 2 years and maybe switch to a better product at that time without any fees.