ok if you getting pain from the saddle on your lady parts after doing just 2 miles, then padded shorts arent really the solution to that, Id say theres a fundamental bike setup issue there, either the saddle is too high or pitched up not level,or the bars too low, or you might be having to reach to far forward to hold the handlebars, that means you are putting all your weight forward. when you should be sitting on the saddle so the weight goes through your sit bones which is your pelvis and then that rotates things out of the pressure zone .
so maybe because of your height, the bike just isnt setup properly for you yet.you dont need to pay for a bike fit (unless you want to), but there are GCN videos https://www.youtube.com/watch?v=FVu5Zrktm40
that cover setting up your bike to a good ballpark comfort level. though definitely go get a saddle sit bone measurement, its free in most bike shops and youll probably find a womens specific saddle more comfortable as your hips
that said once all thats sorted, then yes padded shorts/bibs are the way to go, my hips are 40", though Im size 16 and 5'10, but I actually find the DhB a really good fit and they size it in womens sizes, so the 16 really is a 16. I dont have much Pearl Izumi kit not for fit issues, but just their stuff has never appealed,though you will find alot of cycling shorts are compression fit, so feel like a size smaller than than youd think you want