switching to formula?

I'm currently breastfeeding my 4 week old. It's been physically and mentally exhausting. I feel like I'm stuck at home and cant go out without him since he feeds every 2-3 hours. it's so difficult being the only one who can feed him especially in the middle of the night. I've also had a few latch issues which makes it very frustrating for baby and I. I've been thinking about switching to formula for both of our sanity. just curious of any challenges that you guys have encountered with formula. I've heard of excessive spit up, constipation, and gas. was there anything else that was difficult to deal with? and any recommendations for formula? just trying to make the best decision for both of us! thanks in advance!