Baby has a cold

My 5mo has a cold and is SUPER congested. I can hear she has thick mucus but every time I go in with the nose frida snot sucker nothing comes out :( It’s making it difficult for her to nurse comfortably. I’ve tried vapor rub, warm bath with vapor rub drops, sitting her in the bathroom while I took a hot shower. This is her 5th day being sick and I know that the mucus she has is the last bit but I just can’t take it out 😭 I ordered an electric snot sucker but it won’t be here till Friday 😭