Sleep regression and teething

What the best advice you could give ? My daughter used to sleep 10 hrs through the night since 4 weeks now she’s waking up anywhere from every5 hours to every hour and it’s definitely hard on me . She’s 4 1/2 months . Sometimes she’ll only go back to sleep if she’s sleeping on me while breastfeeding and i just need some advice because I’m a ftm so i never experienced this.