I feel awful writing that but I'm at the end of my rope. I just don't know what's happened.
My normally (mostly) lovely 15 month old DS has this week turned into a clingy, screamer. He's constantly requesting breastmilk, he had dropped to about 3 feeds a day and had night weaned and now he's screaming for it hourly.
I keep offering him snacks, water and he does now have some cows milk but he rejects it all. He doesn't seem particularly hungry, he will eat his breakfast/lunch and dinner but usually not all of it so I know he's not starving.
If I put him down for a second to go to the loo, make his lunch, attempt to tidy, or throw up he arches his back, grabs my clothes, skin and shrieks.
He's also started night waking again and screams for a breastfeed. He weaned well and quickly about 3 months ago and even before he never used to scream, screech and pinch at night, he used to just wake and snuffle. He has always had problems with reflux and has night time ranitadine as his reflux used to wake him and then he'd want to feed but this stopped as soon as he was put on to his medication. He's on the right dose for his weight so I'm certain it's not that.
I'm 12 weeks pregnant, have HG which I'm on meds for, my nipples feel as sore as they did in my first months of breastfeeding and I'm drop down exhausted. I have tried to limit his feeds, distract him, cuddle him but nothing works he just screams, launches himself around, pinches, headbutts the floor, wall, table, me. He pulls at my clothes and bra and scratches me. I tell him no, gentle and move him away until he calms down but he just doesn't! Nothing comforts him.
I honestly feel terrified at the moment about having two children as I can't even cope with this one! I don't feel excited anymore about the baby, just horrified at the thought of less sleep and more feeding than I'm already doing. I feel like a husk.
I have my first scan tomorrow and feel horribly guilty like if something is wrong I've wished it on myself. I know that's illogical but I just feel so bad, like I'm an awful mum to both my son and the baby inside me. 
I just feel like he's either screaming or breastfeeding at the moment. I feel so tired, sick and miserable. I don't know what else to try or what's changed and why he is acting this way. He seems so, so unhappy and nothing I try seems to help.