I went through something similar after a bad bout of mastitis and it took my supply almost a month to really stabilise, so two weeks may still be early days for your body to fully recover. It might be worth seeing a lactation consultant or your PD for some guidance, because they can look at your whole situation, including the stress of going back to work, which can genuinely affect supply on its own. Some mums find that power pumping or adding an extra session helps nudge things back up, while others find that keeping demand consistent is enough over time. Going back to work adds a real variable, so it is hard to say which approach suits you best without knowing your routine, but the key is probably not to make too many changes at once.