Breastfeeding & loosing weight

Alright so I had my baby 3 months ago and I’ve been breast feeding since.. now I herd breastfeeding will help u loose weight but I feel that Everytime I breastfeed him I feel the need to eat. I don’t over eat but it just feels like I’m constantly eating. Anyways although I love my body because it gave me my baby boy I’m also not happy because of the weight gain😔 it’s gotten to the point where I’m not comfortable going out because I feel like everyone is starring at me. I almost stopped breast feeding just because I wanted to try the phentermine diet but I couldn’t because I love the bond my baby and I share. Is phentermine safe to take? (Stupid question but I’d like to Kno if anyone has taken it while breastfeeding) what can I take that will help with loosing weight and safe for breastfeeding Of course I will also make healthier choices and be more active. Thanks for ur advise.