36+4 only gained 4 pounds

Due to my Hyperemesis I’ve barely started gaining weight. I’m. 36 weeks and 4 days. I’ve only gained a total of 4 pounds. I lost 20 pounds total and barely picked it back up. I can’t eat some days, been in the hospital a minimum of 9 different times to get ivs. I’ve been dehydrated my entire pregnancy. Only plus is, I’m not swelling everywhere and I recently (within the last 3 years) lost over 147 pounds so I didn’t blow back up. That was my biggest fear getting pregnant was gaining all that weight back. My baby is growing fine, he’s right on track where he should be. Mama is just miserable as hell 😩😩😩