Is anyone else’s toddler super clingy??

My 18 mo old son is sooo clingy to me and it’s exhausting. I do stay at home with him so I get he is around me all day everyday, but he has never gotten past being okay without me. Sometimes for maybe an hour I will go to the store and he will stay with my husband, but most of the time he gets upset and wants me. He also used to take my mom but then we got Covid, had to quarantine for two weeks and since then (around Christmas time) he won’t take anyone but me.

I’m just so exhausted and expecting baby #2 in June. He won’t let anyone put him down to nap, to sleep at night, etc. he only comes to me if he is hungry, tired, or needs something- he won’t even go to my husband.

I’m just not sure what to do and how to make him a little more independent (as in can be watched by someone else more than an hour).

It’s so hard going to OB appointments because he cries the whole time when staying with my mom and I’m super worried about when I go into labor what he will do.

Anyone else experience this? Tips?