I’ve been memorizing Qur’an for 3 yrs, alhamdulillah. Due to hardships and motherhood, I’m struggling to keep up. Is it better to pause hifdh and focus on gaining Islamic knldg while maintaining a daily portion with transl and tadabbur, or continue my classes while struggling to memorize ?

Don't deprive yourself from goodness. Schedule your time more properly. My advice is that you can decrease the amount that is causing you hardship, but make sure you're still memorizing, revising, and seeking knowledge. Always try to do what you're capable of doing without overwhelming yourself. So don't go to extremes: either I overwhelm myself or I quit altogether. No, find a middle ground that is doable and can be maintained.