7dpo: And the rollercoaster continues

So, I've been testing every morning, first thing, to test out my trigger shot. Yesterday (6dpo), the line was questionable. Was it negative, was it barely positive or was it an evaporation line? I figured the best course of action was to test again today.

So, I tested again today and the line this morning was faint, bet definitely darker than yesterday's. Did I have a faulty test yesterday, was my urine more diluted yesterday or am I officially pregnant? I will test again tomorrow to see if tomorrow's is lighter or darker, but I though this (testing out the trigger) was supposed to be the easiest part of the 2ww. At least it's giving me something to work on and obsess about instead of constantly wondering whether or not we're pregnant.
 
There is no way (unless I metabolize the trigger really fast) that I should have tested negative yesterday. According to drug information for ovidrel, its half-life is 29 +/- 6 hours. Using 23 hours, 29 hours and 35 hours, and the amount of ovidrel I injected, I should still have had 141, 272 or 466 units of hcg in my system, all of which are much higher than my HPT's sensitivity of 20. So, did I have a faulty test or too diluted urine? This morning, I still should have had 86, 179 or 330 units of hcg in my system from the trigger, so still should have seen a positive.

23 hour half-life	HCG		29 hour half-life	HCG		35 hour half-life	HCG
Injection	6500		Injection	6500		Injection	6500
Ovulation	2875		Ovulation	3304		Ovulation	3706
1dpo	1740		1dpo	2179		1dpo	2623
2	1053		2	1437		2	1857
3	638		3	947		3	1314
4	386		4	625		4	930
5	234		5	412		5	658
6	141		6	272		6	466
7	86		7	179		7	330
8	52		8	118		8	233
9	31		9	78		9	165
10	19		10	51		10	117
11	11		11	34		11	83
12	7		12	22		12	59
13	4		13	15		13	41
14	3		14	10		14	29
15	2		15	6		15	21

The above chart contains my calculations based on 6500 units of hcg in a 250mg injection of ovidrel and the three half-lives (23 hours, 29 hours, 35 hours). So, according to my data, I really should be testing positive until 10dpo at the earliest! So, again, what the heck is going on?

This chart uses my two known betas (Oscar's and Bella's pregnancy which started as quads and Gus' and Tittle's pregnancy).

dpo	Median from BetaBase for Singleton		Oscar, Bella	Compare to Singleton		Tittle, Gus	Compare to singleton
6							9.971875
7				20.596875
8							19.94375
9				41.19375
10	15						39.8875
11	24			82.3875
12	38						79.775
13	63			164.775
14	103						159.55
15	139			329.55
16	210					638.2	319.1
17	300		2636.4	659.1

So, my official beta for Oscar's & Bella's pregnancy (quads) was 2636.4; dividing by four gives the 659.1. With Tittle's and Gus' pregnancy, my official beta was 638.2; dividing by 2 give the 319.1. I then assumed that the beta would double every two days, and went in reverse to find the estimated betas for the days prior to my official blood tests.

So, based on my two betas...I'm above the median from BetaBase, but it looks like I was in close range between the two pregnancies, so maybe I just make a lot of hcg?

If I metabolize hcg quicker than average and make more hcg than average, then maybe today really was a true positive. My fingers are crossed and my heart is hoping.

* If you've stayed all the way down to the bottom of this post, thank you for staying with me as I crazily try to grasp for control and predictive powers as I continue to wait out my 2ww. Have I mentioned that I'm not a patient person and hate waiting? But, at least this give my mind something to think about other than getting stressed about whether or not I'm pregnant.