12 weeks & I don’t feel like me

I’m 12 weeks and I don’t feel like myself. I can’t wear my jeans anymore i feel like I’m growing out of my clothes it’s getting tight. I don’t sleep well at night I toss and turn through the night sometimes I can be tired and just can’t sleep. I know it’s just the beginning but I just can’t wait to get this baby out and I just don’t feel I myself I can’t work as much as I want to and I feel like I get irritated so quick like I’ve been in a bad mood since yesterday stemming off my mom and I going back and forth. I haven’t seen my child’s father since September and I just don’t know what to do. I hate that I feel like my bad moods just last longer now and I just want to feel normal again