Very Frustrated at myself??Gaining weight help?!?

hi everyone I'm feeling very very frustrated at myslef at the moment just a lil over two months ago My Husband got sent back to Baghdad , Iraq Since then it's been very hard for me with this extentsion after 1 yr deployment already i feel like I've gained weight not meaning to I've been drinking a lot of water and trying to eat right but also my sleep schedule is very messed up I've been sleeping a lot lol..also is it normal to have a heart rate of 80-110bpm at night? and I want to lose weight before my husband comes home in like 5 weeks let me know thanks !