Sinus infection with an 11.5 week old 😫😷

I have had a sinus infection for 4 days now! I still feel terrible and I also have a horrible cough now. I think my baby is sick also because I am

Exclusively breastfeeding and holding him all the time. He is much more tired lately and will scream and cry a different noise than I have heard before so I think he is suffering too. It’s so hard taking care of myself and him while sick, my husband won’t help! My son has been waking up every 1-2 at night also and won’t sleep in his bassinet right now, he is cosleeping with me and I feel like I am nursing him the entire night because my coughing wakes him up. Any tips to dealing with infants while sick?