Extremely weak body!

Iv always thought I have an extremely weak body. Any form of physical activity leaves me feeling very sore and crippled! Like on Monday I done 10 squats and 5 lunges and my thighs are incredibly painful! It’s so painful to walk and I can’t even touch them as they are so tender! If my little girl tries to sit on my lap it makes me cry because it hurts so bad! I get like this after anything! Even after having sex my body is sore and painful! Or carrying shopping bags leaves my arms in pain aswell! Why am I like this??