please help... should I go in?

I'm 25w4d with my 4th and don't know if I'm just being paranoid or not. I've had a bad cough for over a week and saw a doctor on the weekend to get a new inhaler for it. on Monday I noticed my baby's movement has changed from constant kicking to periods of sluggish stretching and periods of rapid movement. Yesterday I started getting cramps in the middle of my thighs like I'd done a ton of squats and then around 3 o'clock my BH started coming more and more frequently- after an hour of timing them they were down to 4 minutes apart and lasting 2 minutes each. They still weren't really painful - just a dull cramp when they peaked. I showered and drank some water and that slowed them down to only 3 or so an hour so I went to bed. all night I had back and hip pain which has continued into the morning. I still have the leg cramps and now menstrual-like cramps as well but the BH have not gotten much more intense. no bleeding, no change in discharge, slight increase in pelvic pressure.

Update: Thanks ladies for responding. I ended up going in last night after speaking to a nurse about my symptoms. I have dilated to about 1.5cm and thinned to 2cm (from 3.5 at 20wk scan) but thankfully there was no change in a 4 hour window so I was given Morphine and gravol to stop the cramps. I was able to get some sleep eventually although my BP dropped really low for about an hour when I was getting ready to go (about 2 hours after the shot). I'm home safe and keeping an eye on any resurgence and increase of symptoms. Thanks again for all your advice.