Brown dry spots on my arm during pregnancy??

I’ve had this for a couple months and I’m the type to not be dramatic lol 🤦🏻‍♀️ so I haven’t said anything to my doctor because I thought maybe it was just dry skin but I use lubriderm for extra dry skin everyday on it everyday and never goes away or seems to get any better and it’s very dry feeling. My body I swear is soooo thrown off by having my first and only boy after having 3 girls. Anyone else deal with something like this? I see my doctor in a few weeks so I will be addressing it then. Tia ✨💕 (22 weeks pregnancy currently)