Help?

My period started on the 23rd of last month like always. Never am I late or anything. I normal experience no symptoms of my period other then when I wake up the day of the 23rd and go pee to find my period and I then get cramps after peeing. They are never horribly bad. Other then that the first day I am tired and go you bed a little early. My normal bed time is about 11 and I go to bed at like 8. .you issue is right now that my girl friend and I are trying to get preganant. I will be carrying the baby as she is my partner in this. On 12/13 we made plans with our trusted donor to go through with this. It so happened he came 2 times. Nothing leaked out for about an hour and a half after sex. I layed with the legs us and actually didn't pee until the next day.my concern is for the first time ever my period still has not come and it's 5 days late. I have been experiencing bloating for about 3-4 days as well. On thre 18th of this month I experienced some red vaginal bleeding that lasted about 4 days and by the 4th day it was almost non existing. It lightened up after the first day and I was able to were panty liners, now for me that's weird because my period has always made me were a maxi pad or a super tampon. The last 2 days of this it also was more pink in color and only when i wiped. This being said I went to the Dr's the day of the 18th and the urine test came out negative. 2 days later I followed up with my pcp and another negative urine test. My dr said there is no way i am pregnant.. ugh. I dont belive it. Now 2 weeks since I've had sex as of today 12/27, and still no period or any bleeding. I did through out this experience a lot of different symptoms such as cramps unlike period cramps, swollen and tender breasts, stomach pain more like gas but not able to make a bowel movement and or pass gas. This week I also experienced a wet feeling while walking and when I went to the bathroom to check in have a very small amount of white discharge that was a tiny bit wattery. I would also say that i do have sone moodyness and random crying episodes over random things.. I also experienced a feeling of hunger for food that I haven't ate in a while and or that I just want carbs and a lot of fatty food. I ate chocolate like crazy witch is unusual for me, and I also am now as of the past few days experiencing shortness of breath when sitting still and talking noramally. I'm continuing to get negative pregnancy home tests as of yesterday 12/26. Please someone help me with what's happening? Thank you!

All of this is unusual for me.. wondering if anyone else has this same problem?

When should I get a positive test if I am pregnant? And when do you think my period will start if I'm not pregnant?

A lot of this isn't normal for me, and to be honest this is my first time going through anything like this.. help is very much appreciated!