How long this will take??

There's no good answer for this. Doing all of those things to stimulate contractions (, walking, spicy food, nipple stimulation, etc) will only work if your body is ready to go into labor. Sometimes they stimulate contractions but they'll stop when you stop walking or whatever. The last few weeks of pregnancy can be extremely miserable for some people, but just remember there is light at the end of the tunnel. If something doesn't happen in a few weeks, your doctor will probably induce you, but it's better to happen on it's own if you can. If you are feeling all of that pressure, she is probably engaging herself in your pelvis to prepare to come out. This is normal. Hopefully she'll get her head down there and start putting pressure on your cervix to help it start dilating. Be patient and good luck!!