engagement and raspberry leaf tea?

Vicki
Feeling lots of pressure since 31 weeks now 32 weeks, had midwife this am and asked when baby usually get engaged and she said for second time + mums baby doesn't usually get engaged until labour and I don't want it happened yet as all I'll feel is presure now until baby's here! But feel as through baby's already engaged with the pain and pressure I'm feeling!! Now worrying about baby coming too early! 
Ask asked about having raspberry leaf tea was going to start now with 1 tea a day for 2 week then 2 teas a day for 3 week and 3 a day for next 3 weeks, but she's said not to have any until 37 week! I've got 100 tea bags at home won't use all of them in 3 weeks. When are you ladies starting to take it? I can't remember when I started with my son.