I went through this twice between 10.5 months and 12 months but was due to him being sick and not being able to breath. We went almost 5 days without a feed he would refuse then I offered and bam he was back on.
I have cut the feeds down as I'm also pregnant and I think my supply had dropped but don't lose hope just keep offering and with time you will see if he is truly off or just a phase. At least if he is weaning it's his choice you aren't forcing him or making him cry for it. That's what I kept telling myself
. Hugs I know it's hard emotionally and hard not to feel rejected