Growth spurts can last up to 5-7 days in extreme circumstances - although 2-3 days IS more common.
Starting solids at this age (particularly if you are breastfeeding where you've also got to consider your supply) is not recommended.
Why not post on the breastfeeding board? Explain your routine and describe how your feeds are going. Hopefully we can help you.
Is he satisfied just after a feed has finished?
Weight gain OK?
Nice heavy wet nappies?
Yellow mustardy poos?
Are you single or double-sided feeding?
It may well be a growth spurt but let's take a look at everything.
Welcome to the boards