S.,
Skin problems come from the inside. They are a reflection of some sort of imbalance INSIDE your body. Creams and lotions, prescription or not, will not address the underlying cause of the imbalance. Some of the chemicals also are highly toxic.
Consider starting with dietary changes.
For some reason, pregnancy promotes yeast overgrowth/candida in the body. In my personal experience, this contributes to adult acne. This is exacerbated by a diet high in sugar and any carbs (pasta, bread, crackers, etc). Have you been craving sweets at all? This is another sign of a sugar/candida problem.
Try going on a VERY VERY VERY low sugar/carb diet. Sugar includes traditional sweets, but also fruit, juice, bread, pasta, crackers, white rice, etc. No processed grains. Also, get some grapefruitseed extract and take 10 drops in water on an empty stomach a few times a day. This is HIGHLY effective for eliminating yeast. I use a product called Agrisept, available on the internet. A candida diet is very strict. It will be MUCH easier with the grapefruit seed extract.
Also, you could have an imbalance of omega 3 and omega 6 fats. Try to cut back on vegetable oils and introduce a good fish oil supplement. I use Carlson's Fish Oil, available at Whole Foods and some other good pharmacies like Royal Abrams Pharmacy. Walnuts and pumpkin seeds (pepitas) are also good.
My own adult acne is completely gone and I attribute it to my having addressed these two things in my diet: omega 3 deficiency and yeast overgrowth. I also had a history with using Proactiv.
Also make sure you are getting good sleep and lower your stress levels. Any healing is more difficult when you are not being good to yourself.
Good luck.