help! multiple problems

[snakekid6996]

My amazon tree boa has been having problems since I got her. I've had her for about a month and a half or two months now and she has had all of her shed except her head stuck on her for the last 2 weeks. She's ate twice and regurgitated both times. This is my third snake and the other two I've never had much of a problem at all with. I've never had any regurgitations and their sheds are usually good. This is my first somewhat more advanced snake. I keep her hot spot at about 85-88F and her cool end stays around the low 70's. Her humidity usually is between 60-90%. I've soaked her but it didn't help with the shed at all, but I'm going to try a damp pillow case and washcloth today. It just really makes me nervous, because like I said this is my first non begginer snake and the first time I've ever had much of a problem with any of my snakes. It's nerve wrecking to be honest. Any advice would be appriciated. Oh and also she is kept in a 106QT. Tub with cypress mulch and a rhp for heat. She has a hide on the warm side and multiple crossing perches on the warm and cool ends with plenty of foliage. Thanks.