If you are getting sick a lot, maybe you are run down -- would be normal for the mom of a two year old. Take good care of yourself. Lots of good nutrition, exercise, fresh air, 8 glasses of water a day, and REST can build up your immune system to where you don't catch every bug that comes around. Really look at your diet -- are you getting enough fresh fruit and vegetables? Do you take a good multi-vitamin? How about daily exercise --other than chasing your toddler
If you are feeling sluggish, have your thyroid levels checked. Post pregnancy is a big time that those levels go askew. That can also leave you more susceptible to other illness. I was always sick when my thyroid was low. Sometimes an immune system can work in overdrive on the wrong thing -- as in Hashimoto's where it attacks the thyroid and then seems to let the defenses down against common germs.
How about iron levels? Feel anemic? That too can leave a person more open to other bacterial and viral sickness. These "germs" are around us all the time but a good healthy immune response can keep us from feeling the down sides of them. Women need more iron, especially during child-bearing years. Beef up your meals with lots of dark green veggies and red meat, beans, eggs, etc.
Have you changed your furnace air filters regularly? I know that sounds silly, but we find if ours get dirty, they do not do as good a job at filtering all the crud out of the air that seems to trigger allergy type symptoms -- which in turn set a perfect environment for germs to set up house and cause us to get sick. So, clean air and a clean house is important too.
Speaking of clean air -- any smoking in the house? Smoking weakens the immune system. Smokers wind up taking a lot more sick days than non-smokers. 2nd hand smoke is a problem too. My youngest had constant ear infections until I quit smoking and banned smoking from the house. Instant cure for him!
I would suggest hormone imbalance as a potential cause of the night sweats but if baby and hubby both had the same thing, then it is probably viral. Lots of those going around -- especially in the winter when houses are closed up. Not a lot to do except try to keep a healthy body and immune system which will fight off the most of them. Become a compulsive had washer too.
I may not have hit on any problems that pertain to you, but thought I would throw them all out for consideration. I spent a few sick years treating one illness after another -- finally I think I am a much healthier person. Not through any medicine or doctoring but just taking better care of myself to start with.