How to overcome separation anxiety from your child?

I’ve had separation anxiety from my baby since she was born. She will be 2 this coming January. I have extremely bad separation anxiety. Its mainly at night time. Like tonight me and my husband took our 7 year old to the drive in and we left before the movie was even over because I was starting to have a panic attack because I needed my youngest baby. I breastfed her until she was 15 months old, and I’m a stay at home mom. We have a very strong bond. She is very attached to me as well. Tonight she stayed with my mother in law and she fell asleep and I know she’s in good hands but I just have awful anxiety when I’m not with her. Has anyone else ever experienced separation anxiety but gotten through it?? I’m afraid I’m seriously going to have this forever