Extremely sore back! Rant

BrittanyπŸ‘¨β€πŸ‘©β€πŸ‘¦β€πŸ‘¦β˜•οΈ β€’ 28 yr old Boymom of two wonderful boys, Blaine and August. Currently pregnant with #3! Due December 2016 😍
For the last week my back has become sooo unbelievably sore. Most days I have a heating pad on because if I don't I'm in so much pain. My BF gives me short back rubs that kinda help and I have to take Tylenol before bed in order to get any sleep. My left side hurts the worst. I can only lay that way for maybe 3 min. Last night was awful, I seriously wanted to cry! I also have a 4 yr old who is very active and I feel like the worst parent ever because I'm completely exhausted all the time now. He can go to daycare but then I feel guilty because I'm sitting at home. I have less than 6 wks left but it's taking forever 😩😩😩. Any tips, tricks or encouraging words to get me through the remaining weeks?! I could use them!