I'm 22 and have a 'comfort blanket'

After a few weeks since I found out I was pregnant I have always needed to sleep with my blanket. It's a white one from primark with purple butterflies on it and is fluffy. I have always had it on my bed but now I feel the need to cuddle into it to fall asleep, either just holding a corner of it with my hand or wrapping myself up in it. Every single night I can't sleep without it.  Is this just because I'm pregnant as a comfort thing? I'm single and have been since I was 4 weeks pregnant and the father wants nothing to do with baby so I have the support of my mum who I now live with and will for the foreseeable future. I am also an only child.  Just curious is anyone else had this 'comfort blanket' thing when you were pregnant. Sorry for posting anonymously I feel embarrassed to talk to anyone about it.