This is my first ever post on a fertility forum. Sadly, that doesn't mean I'm new to infertility, just a previous lurker who really needs some help.
So our story in brief: 3 years of TTC, two failed IVF cycles with own eggs (two fresh transfers, one FET, 4 embryos total all created from eggs showing signs of poor quality). This year moved onto donor eggs, found an amazing proven open donor on here and ended up with 6 (!) beautiful frozen blasts from our half of the eggs. In contact with other couple from egg sharing and they got pregnant with a fresh transfer and are currently 5 months pregnant with a girl. Our first FET with donor egg embryo resulted in our first ever BFP, but sadly my hcg never got above 300. Dr put it down to bad luck so proceeded with another FET right away; just found out that this transfer is a BFN. We still have 4 frosties but I don't want to waste them if there's something else wrong with me. We thought DE would fix things so is this just bad luck or something else?
My biggest concern, and something my Dr can't give me a reason for, is that with 4 out of our 5 transfers I've experienced severe cramps in the middle of the night 3-10 days post-transfer. The cramps are often centered around my left side and last about 10-20 mins. They're so severe that I get overheated, sweaty and often vomit. With our two fresh transfers the cramps occurred a few days after a 2/3-day transfer so my Dr thought it could have been my ovaries recovering from the retrieval. As a precaution I've been on buscopan for my FETs, but with my FET that gave our BFP I experienced the cramps 10dp5dt, hours after a great first hcg level and then my hcg didn't quite double and then went down. With this last FET I had the cramps 7dp5dt and again about 12 hours later (so during the day). Usually I only have one bout of the cramps, sometimes with milder bouts in the following days.
Has anyone else experienced or heard about cramps like this after a transfer? I've obviously heard of implantation cramps but I can't help thinking that these are much more severe and a sign of something else going on. I worry that the cramps are part of my body reacting badly to the embryos, or that I could have undiagnosed endometriosis or something that flares up when I'm on all the hormones (for my last two FETs my estradiol and has been sky high due to vaginal Estrace - 14,000!).
I'm just really looking for ideas of what to do next and/or anyone who has had cramps that sound like mine. I know I won't be able to not give our remaining 4 embryos a chance at life but I'm so scared to go through all of this again. I do have a few possible red flags for immune problems I think (hypothyroid but no antibodies, low neutrophils, low AMH for age, wrist pain) but my anti-nuclear antibodies and C reactive protein came back fine.
Please help me if you can! My husband tries his best to understand but I feel so alone.
Thanks for reading x