Lactation aid

Jenn • I`m 36 Dh is 40 and we have 2 girls age 6 and 15 months 🥰
Does anyone else supplement using a lactation aid / sns? My baby wasn't gaining on breastfeeding alone so I've been supplementing with a tube at my breast for 7 weeks now. It's a lot of work and i sometimes want to give up but I know there are so many benefits to continuing to breastfeed! Terrified to use a regular bottle to supplement as she didn't latch until she was 5 weeks old. 
Just wondering if I'm not alone in this.