Early Signs? Night Cramps & Sore Nipples?

I've been charting temps for 3 months now and this was the 1st time I was able to pinpoint ovulation and bd on the exact right day.
Here's what's happened since then:
1-2 dpo = nothing
3 dpo = woke up in the middle of the night with strange cramps that were gone by the morning. Bloated during the day.
4 dpo = same strange cramps at night. Bloating still. Took off my bra and my nipples felt like they had been stung by bees.
5-6 dpo = some cramps during the day but they dont feel like af cramps. Also the same weird night cramps, they actually wake me up. Sore nipples. Usually AF makes my breasts tender and swollen but this is only my nipples the rest of my breasts have no pain.
7 dpo = today, minor back cramps. woke up at 6am with weird night cramps that went away as soon as I got out of bed. Still very sore nipples.

Anybody experienced these things? I don't want to get my hopes up but this is in no way normal behaviour for my body. I have done 2 hpt's but it's too early so they are neg. I just have no patience since we've been trying for 4 & a half years.

Thanks