Mums, I’m dying from being exhausted by breastfeeding on demand.

I rejoined work after maternity leave and my LO is 4.5 months old now. Previously I was at my hometown but have recently shifted back to be with husband (we live away from both sets of parents). I’ve always breastfed on demand but I think my LO is going through a combination of sleep regression and growth spurt and I’m so exhausted from breastfeeding on demand (since I wfh).

It doesn’t help that my mom and the gynaec at my hometown told me to forego the idea of pumping when I resumed back work. Should I get a second opinion from the gynaec I visited during my pregnancy here? Does your milk supply get affected if you do a combo of both BF and pumping?