I am almost 39 weeks pregnant, starting last night I began getting period like cramps, this morning my baby felt like he had moved sideways head on the right side feet on the left, ever since then he has been moving non stop (before he was super lazy and non active unless it was bed tkme). It does feel like he is back to being head down. How do I know if he is ready again (head down) and why all the sudden non stop moving, cramp like feelings, and pressure?