Night time fever

At night time I feel like I'm about to have the flu. I get so cold even with a fleece blanket, socks and my a/c set at 78. I normally sleep with it at 74. Af is due in 3 days but this have been happening the past week. I'm also really bloated and I belch all day. With mild nausea. Is this a sign, is it normal, has this happen to anyone